This script follows the actions on the slides

Preparing the data

# data prep
gadarian_corpus <- corpus(gadarian,text_field="open.ended.response")
gadarian_toks <- tokens(gadarian_corpus,
                         remove_punct=T,
                         remove_numbers=T) %>%
  tokens_remove(stopwords("en"))
gadarian_dfm <- dfm(gadarian_toks)

Estimating a topic model

gad_stm_1 <- stm(gadarian_dfm,K=10,seed=2020)
## Beginning Spectral Initialization 
##   Calculating the gram matrix...
##   Finding anchor words...
##      ..........
##   Recovering initialization...
##      .............
## Initialization complete.
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 1 (approx. per word bound = -6.662) 
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## .................................................................................................................
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## Completing Iteration 5 (approx. per word bound = -6.260, relative change = 3.998e-03) 
## Topic 1: security, right, aliens, nation, get 
##  Topic 2: care, life, taking, better, etc 
##  Topic 3: country, americans, social, mexico, america 
##  Topic 4: immigrants, many, coming, system, can 
##  Topic 5: illegal, need, services, live, time 
##  Topic 6: illegals, border, legally, free, benefits 
##  Topic 7: taxes, work, pay, crime, health 
##  Topic 8: immigration, think, come, legal, english 
##  Topic 9: jobs, get, learn, language, want 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 6 (approx. per word bound = -6.245, relative change = 2.386e-03) 
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## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 10 (approx. per word bound = -6.214, relative change = 8.678e-04) 
## Topic 1: security, get, aliens, right, nation 
##  Topic 2: life, care, taking, better, etc 
##  Topic 3: country, americans, social, mexico, america 
##  Topic 4: immigrants, many, coming, system, can 
##  Topic 5: illegal, need, services, live, time 
##  Topic 6: illegals, border, free, legally, benefits 
##  Topic 7: work, taxes, pay, crime, health 
##  Topic 8: immigration, think, come, legal, welfare 
##  Topic 9: jobs, learn, language, want, get 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 11 (approx. per word bound = -6.209, relative change = 8.055e-04) 
## .................................................................................................................
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## Completing Iteration 14 (approx. per word bound = -6.192, relative change = 8.854e-04) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 15 (approx. per word bound = -6.187, relative change = 8.831e-04) 
## Topic 1: security, get, aliens, right, nation 
##  Topic 2: life, taking, better, etc, care 
##  Topic 3: country, americans, social, mexico, jobs 
##  Topic 4: immigrants, coming, many, system, can 
##  Topic 5: illegal, need, services, live, schools 
##  Topic 6: illegals, border, free, benefits, legally 
##  Topic 7: work, taxes, pay, crime, health 
##  Topic 8: immigration, think, come, legal, welfare 
##  Topic 9: jobs, learn, language, want, poor 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 16 (approx. per word bound = -6.181, relative change = 9.004e-04) 
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## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 20 (approx. per word bound = -6.162, relative change = 5.679e-04) 
## Topic 1: get, security, aliens, right, nation 
##  Topic 2: life, taking, better, etc, care 
##  Topic 3: country, americans, jobs, social, mexico 
##  Topic 4: immigrants, coming, many, system, can 
##  Topic 5: illegal, need, services, schools, live 
##  Topic 6: illegals, border, free, benefits, legally 
##  Topic 7: work, taxes, pay, crime, money 
##  Topic 8: immigration, think, come, legal, welfare 
##  Topic 9: jobs, learn, language, want, poor 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 21 (approx. per word bound = -6.158, relative change = 6.212e-04) 
## .................................................................................................................
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## Completing Iteration 23 (approx. per word bound = -6.150, relative change = 7.638e-04) 
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## .................................................................................................................
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## Completing Iteration 25 (approx. per word bound = -6.139, relative change = 7.879e-04) 
## Topic 1: get, aliens, right, nation, children 
##  Topic 2: life, better, taking, etc, u.s 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, coming, many, system, care 
##  Topic 5: illegal, need, services, schools, live 
##  Topic 6: illegals, border, free, benefits, legally 
##  Topic 7: work, taxes, pay, crime, money 
##  Topic 8: immigration, think, come, legal, welfare 
##  Topic 9: learn, language, jobs, want, poor 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 26 (approx. per word bound = -6.135, relative change = 7.053e-04) 
## .................................................................................................................
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## .................................................................................................................
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## Completing Iteration 29 (approx. per word bound = -6.122, relative change = 6.179e-04) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 30 (approx. per word bound = -6.118, relative change = 6.010e-04) 
## Topic 1: get, aliens, nation, right, children 
##  Topic 2: life, better, etc, taking, u.s 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, coming, many, care, english 
##  Topic 5: illegal, need, services, schools, live 
##  Topic 6: illegals, border, free, benefits, laws 
##  Topic 7: work, taxes, pay, crime, money 
##  Topic 8: immigration, think, come, legal, welfare 
##  Topic 9: learn, language, poor, want, also 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 31 (approx. per word bound = -6.114, relative change = 6.331e-04) 
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## .................................................................................................................
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## Completing Iteration 35 (approx. per word bound = -6.093, relative change = 8.861e-04) 
## Topic 1: get, aliens, nation, right, children 
##  Topic 2: life, better, etc, becoming, u.s 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, coming, many, english, care 
##  Topic 5: illegal, need, services, schools, live 
##  Topic 6: illegals, border, free, benefits, mexico 
##  Topic 7: work, taxes, pay, crime, money 
##  Topic 8: immigration, think, come, legal, welfare 
##  Topic 9: learn, language, poor, want, also 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 36 (approx. per word bound = -6.088, relative change = 8.216e-04) 
## .................................................................................................................
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## Completing Iteration 37 (approx. per word bound = -6.084, relative change = 7.326e-04) 
## .................................................................................................................
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## Completing Iteration 38 (approx. per word bound = -6.079, relative change = 6.914e-04) 
## .................................................................................................................
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## Completing Iteration 39 (approx. per word bound = -6.075, relative change = 7.218e-04) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 40 (approx. per word bound = -6.070, relative change = 8.043e-04) 
## Topic 1: get, aliens, nation, right, citizen 
##  Topic 2: life, better, etc, becoming, taken 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, english, coming, many, care 
##  Topic 5: illegal, need, services, schools, live 
##  Topic 6: illegals, border, free, benefits, mexico 
##  Topic 7: work, taxes, pay, crime, money 
##  Topic 8: immigration, think, come, welfare, legal 
##  Topic 9: learn, language, poor, also, want 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 41 (approx. per word bound = -6.066, relative change = 7.641e-04) 
## .................................................................................................................
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## Completing Iteration 42 (approx. per word bound = -6.061, relative change = 7.097e-04) 
## .................................................................................................................
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## Completing Iteration 43 (approx. per word bound = -6.057, relative change = 7.151e-04) 
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## Completing Iteration 44 (approx. per word bound = -6.052, relative change = 7.547e-04) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 45 (approx. per word bound = -6.048, relative change = 7.727e-04) 
## Topic 1: get, aliens, nation, right, can 
##  Topic 2: life, better, etc, becoming, border 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, english, coming, many, care 
##  Topic 5: illegal, need, services, schools, live 
##  Topic 6: illegals, border, free, benefits, workers 
##  Topic 7: work, taxes, pay, crime, health 
##  Topic 8: immigration, think, come, welfare, take 
##  Topic 9: learn, poor, language, speak, also 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 46 (approx. per word bound = -6.043, relative change = 7.322e-04) 
## .................................................................................................................
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## Completing Iteration 47 (approx. per word bound = -6.039, relative change = 6.228e-04) 
## .................................................................................................................
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## Completing Iteration 48 (approx. per word bound = -6.036, relative change = 5.373e-04) 
## .................................................................................................................
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## Completing Iteration 49 (approx. per word bound = -6.033, relative change = 4.746e-04) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 50 (approx. per word bound = -6.030, relative change = 5.080e-04) 
## Topic 1: get, aliens, nation, right, laws 
##  Topic 2: life, better, etc, becoming, border 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, english, coming, many, care 
##  Topic 5: illegal, need, services, legal, paying 
##  Topic 6: illegals, border, free, benefits, workers 
##  Topic 7: work, taxes, pay, crime, health 
##  Topic 8: immigration, think, come, welfare, take 
##  Topic 9: learn, speak, poor, can, language 
##  Topic 10: people, us, citizens, job, way 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 51 (approx. per word bound = -6.027, relative change = 4.826e-04) 
## .................................................................................................................
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## Completing Iteration 54 (approx. per word bound = -6.019, relative change = 5.251e-04) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 55 (approx. per word bound = -6.016, relative change = 6.018e-04) 
## Topic 1: get, aliens, laws, nation, right 
##  Topic 2: life, better, etc, becoming, border 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, english, coming, many, care 
##  Topic 5: illegal, need, legal, services, paying 
##  Topic 6: illegals, border, free, benefits, workers 
##  Topic 7: taxes, work, pay, language, health 
##  Topic 8: immigration, think, come, welfare, take 
##  Topic 9: learn, speak, poor, can, also 
##  Topic 10: people, us, citizens, job, legally 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 56 (approx. per word bound = -6.013, relative change = 5.444e-04) 
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## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 60 (approx. per word bound = -6.000, relative change = 4.934e-04) 
## Topic 1: get, aliens, laws, nation, right 
##  Topic 2: life, better, etc, border, becoming 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, english, coming, many, care 
##  Topic 5: illegal, need, legal, services, paying 
##  Topic 6: illegals, free, border, benefits, workers 
##  Topic 7: taxes, work, pay, language, health 
##  Topic 8: immigration, think, come, welfare, take 
##  Topic 9: learn, poor, can, usa, borders 
##  Topic 10: people, us, job, citizens, legally 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 61 (approx. per word bound = -5.997, relative change = 5.000e-04) 
## .................................................................................................................
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## Completing Iteration 62 (approx. per word bound = -5.994, relative change = 5.703e-04) 
## .................................................................................................................
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## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 65 (approx. per word bound = -5.984, relative change = 4.233e-04) 
## Topic 1: get, aliens, laws, nation, new 
##  Topic 2: life, better, etc, border, becoming 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, english, coming, many, care 
##  Topic 5: illegal, need, legal, services, paying 
##  Topic 6: illegals, free, benefits, workers, mexico 
##  Topic 7: taxes, pay, language, work, health 
##  Topic 8: immigration, think, come, take, welfare 
##  Topic 9: learn, poor, can, usa, borders 
##  Topic 10: people, us, job, citizens, legally 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 66 (approx. per word bound = -5.982, relative change = 4.441e-04) 
## .................................................................................................................
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## Completing Iteration 67 (approx. per word bound = -5.979, relative change = 5.077e-04) 
## .................................................................................................................
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## Completing Iteration 68 (approx. per word bound = -5.976, relative change = 5.088e-04) 
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## Completed E-Step (0 seconds). 
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## Completing Iteration 70 (approx. per word bound = -5.970, relative change = 5.184e-04) 
## Topic 1: get, laws, nation, new, aliens 
##  Topic 2: life, better, etc, border, taken 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, english, coming, care, many 
##  Topic 5: illegal, need, legal, services, paying 
##  Topic 6: illegals, free, benefits, workers, mexico 
##  Topic 7: taxes, pay, language, crime, health 
##  Topic 8: immigration, think, come, take, welfare 
##  Topic 9: learn, poor, usa, borders, can 
##  Topic 10: people, us, job, legally, citizens 
## .................................................................................................................
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## Completing Iteration 71 (approx. per word bound = -5.966, relative change = 5.687e-04) 
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## Completing Iteration 73 (approx. per word bound = -5.959, relative change = 5.269e-04) 
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## Completing Iteration 74 (approx. per word bound = -5.956, relative change = 5.038e-04) 
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## Completed E-Step (0 seconds). 
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## Completing Iteration 75 (approx. per word bound = -5.954, relative change = 3.902e-04) 
## Topic 1: get, laws, new, nation, right 
##  Topic 2: life, better, etc, border, taken 
##  Topic 3: country, jobs, americans, security, social 
##  Topic 4: immigrants, english, coming, care, many 
##  Topic 5: illegal, need, legal, services, paying 
##  Topic 6: free, benefits, workers, mexico, illegals 
##  Topic 7: taxes, pay, language, crime, health 
##  Topic 8: immigration, think, come, take, getting 
##  Topic 9: learn, poor, borders, usa, really 
##  Topic 10: people, us, job, legally, work 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 76 (approx. per word bound = -5.952, relative change = 3.760e-04) 
## .................................................................................................................
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## .................................................................................................................
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## Completing Iteration 78 (approx. per word bound = -5.946, relative change = 5.379e-04) 
## .................................................................................................................
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## Completing Iteration 79 (approx. per word bound = -5.942, relative change = 7.431e-04) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 80 (approx. per word bound = -5.938, relative change = 6.246e-04) 
## Topic 1: get, laws, new, right, aliens 
##  Topic 2: life, better, etc, border, way 
##  Topic 3: country, jobs, americans, security, illegals 
##  Topic 4: immigrants, english, coming, care, many 
##  Topic 5: illegal, need, legal, services, paying 
##  Topic 6: free, benefits, workers, mexico, things 
##  Topic 7: taxes, pay, language, health, crime 
##  Topic 8: immigration, think, come, take, getting 
##  Topic 9: learn, poor, usa, borders, really 
##  Topic 10: people, us, job, legally, work 
## .................................................................................................................
## Completed E-Step (0 seconds). 
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## Completing Iteration 81 (approx. per word bound = -5.935, relative change = 4.955e-04) 
## .................................................................................................................
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## Completing Iteration 82 (approx. per word bound = -5.932, relative change = 4.718e-04) 
## .................................................................................................................
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## Completing Iteration 83 (approx. per word bound = -5.930, relative change = 4.421e-04) 
## .................................................................................................................
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## Completing Iteration 84 (approx. per word bound = -5.927, relative change = 3.952e-04) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 85 (approx. per word bound = -5.925, relative change = 3.459e-04) 
## Topic 1: get, laws, new, right, aliens 
##  Topic 2: life, better, etc, border, way 
##  Topic 3: jobs, country, americans, illegals, security 
##  Topic 4: immigrants, english, coming, care, many 
##  Topic 5: illegal, need, legal, services, paying 
##  Topic 6: free, benefits, workers, mexico, things 
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##  Topic 8: immigration, think, come, take, loss 
##  Topic 9: learn, poor, usa, borders, mexico 
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## Topic 1: get, laws, country, new, right 
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## Topic 1: get, country, laws, new, right 
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## Topic 1: get, country, laws, new, aliens 
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## Topic 1: get, country, laws, new, aliens 
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## Topic 1: get, country, laws, new, aliens 
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## Topic 1: get, country, laws, new, aliens 
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## Topic 1: get, laws, country, new, right 
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##  Topic 3: jobs, americans, illegals, security, social 
##  Topic 4: immigrants, coming, many, english, citizens 
##  Topic 5: illegal, need, welfare, legal, services 
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##  Topic 9: learn, poor, country, mexico, english 
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## Topic 1: get, laws, new, country, right 
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##  Topic 4: immigrants, coming, many, country, english 
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## Topic 1: get, laws, new, country, right 
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##  Topic 4: immigrants, coming, many, country, citizens 
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##  Topic 6: free, workers, benefits, things, mexico 
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## Topic 1: get, laws, new, country, right 
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## Topic 1: get, laws, new, country, right 
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##  Topic 5: illegal, need, welfare, legal, job 
##  Topic 6: free, workers, benefits, things, mexico 
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## Topic 1: get, laws, new, country, right 
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## Topic 1: get, laws, new, country, right 
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## Topic 1: get, laws, new, country, right 
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## Topic 1: get, laws, new, country, right 
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##  Topic 7: taxes, pay, care, health, language 
##  Topic 8: immigration, think, come, live, much 
##  Topic 9: learn, english, poor, country, people 
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## Topic 1: get, laws, new, country, right 
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##  Topic 4: immigrants, coming, many, country, citizens 
##  Topic 5: illegal, need, welfare, legal, job 
##  Topic 6: free, workers, loss, benefits, things 
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## Topic 1: get, laws, new, country, right 
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## Topic 1: get, laws, new, country, right 
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## Topic 1: get, laws, new, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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##  Topic 4: immigrants, many, english, taking, country 
##  Topic 5: illegal, welfare, legal, need, job 
##  Topic 6: free, benefits, things, loss, usa 
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## Topic 1: get, new, laws, country, right 
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##  Topic 4: immigrants, many, english, taking, learn 
##  Topic 5: illegal, welfare, legal, immigration, need 
##  Topic 6: free, things, benefits, usa, aliens 
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## Topic 1: get, new, laws, country, right 
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##  Topic 3: jobs, americans, illegals, security, social 
##  Topic 4: immigrants, many, english, learn, taking 
##  Topic 5: illegal, welfare, legal, immigration, job 
##  Topic 6: free, things, usa, aliens, american 
##  Topic 7: taxes, pay, care, health, language 
##  Topic 8: think, immigration, come, need, live 
##  Topic 9: country, mexico, poor, people, really 
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## Topic 1: get, new, laws, country, right 
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##  Topic 3: americans, jobs, illegals, security, social 
##  Topic 4: immigrants, many, english, learn, taking 
##  Topic 5: illegal, welfare, immigration, legal, job 
##  Topic 6: free, things, usa, american, aliens 
##  Topic 7: taxes, pay, care, language, health 
##  Topic 8: think, immigration, come, need, live 
##  Topic 9: country, mexico, poor, people, really 
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## Topic 1: get, new, laws, country, right 
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##  Topic 3: americans, illegals, jobs, security, social 
##  Topic 4: immigrants, many, english, learn, taking 
##  Topic 5: illegal, welfare, immigration, legal, crime 
##  Topic 6: free, things, american, usa, aliens 
##  Topic 7: taxes, pay, care, language, health 
##  Topic 8: think, immigration, come, need, live 
##  Topic 9: country, mexico, poor, people, really 
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## Topic 1: get, new, laws, country, right 
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##  Topic 3: americans, illegals, jobs, security, social 
##  Topic 4: immigrants, many, english, learn, taking 
##  Topic 5: illegal, welfare, immigration, legal, crime 
##  Topic 6: free, things, american, usa, ride 
##  Topic 7: taxes, pay, care, language, health 
##  Topic 8: think, immigration, come, need, live 
##  Topic 9: country, mexico, poor, people, really 
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## Topic 1: get, new, laws, country, right 
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##  Topic 3: americans, illegals, security, jobs, social 
##  Topic 4: immigrants, many, english, learn, taking 
##  Topic 5: illegal, welfare, immigration, legal, crime 
##  Topic 6: free, things, american, usa, ride 
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##  Topic 8: think, immigration, come, need, live 
##  Topic 9: country, mexico, poor, people, really 
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## Topic 1: get, new, laws, country, right 
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##  Topic 4: immigrants, many, english, learn, taking 
##  Topic 5: illegal, welfare, immigration, legal, crime 
##  Topic 6: free, things, american, usa, ride 
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##  Topic 8: think, immigration, come, need, live 
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## Topic 1: get, new, laws, country, right 
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##  Topic 4: immigrants, many, english, learn, taking 
##  Topic 5: illegal, welfare, immigration, legal, crime 
##  Topic 6: free, things, american, usa, ride 
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## Topic 1: get, new, laws, country, right 
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##  Topic 5: illegal, welfare, immigration, legal, crime 
##  Topic 6: free, things, american, usa, entering 
##  Topic 7: taxes, pay, care, language, health 
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## Topic 1: get, new, laws, country, right 
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##  Topic 5: illegal, welfare, immigration, legal, crime 
##  Topic 6: free, things, entering, american, usa 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, country, right 
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## Topic 1: get, new, laws, right, country 
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##  Topic 4: immigrants, english, many, economy, learn 
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## Topic 1: get, new, laws, right, country 
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## Topic 1: get, new, laws, right, country 
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## Topic 1: get, new, laws, right, country 
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## Topic 1: get, new, laws, right, country 
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## Topic 1: get, new, laws, right, country 
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## Topic 1: get, new, laws, right, country 
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## Topic 1: get, new, laws, right, country 
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## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 341 (approx. per word bound = -5.750, relative change = 7.374e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 342 (approx. per word bound = -5.749, relative change = 7.321e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 343 (approx. per word bound = -5.749, relative change = 6.831e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 344 (approx. per word bound = -5.748, relative change = 7.287e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 345 (approx. per word bound = -5.748, relative change = 7.635e-05) 
## Topic 1: get, new, laws, right, country 
##  Topic 2: life, better, done, worry, us 
##  Topic 3: americans, security, illegals, jobs, social 
##  Topic 4: immigrants, english, many, economy, learn 
##  Topic 5: illegal, immigration, welfare, crime, legal 
##  Topic 6: free, things, entering, usa, american 
##  Topic 7: taxes, pay, care, health, take 
##  Topic 8: think, immigration, come, need, legally 
##  Topic 9: mexico, country, immigrants, people, usa 
##  Topic 10: people, us, coming, country, work 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 346 (approx. per word bound = -5.748, relative change = 5.934e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 347 (approx. per word bound = -5.747, relative change = 5.452e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 348 (approx. per word bound = -5.747, relative change = 6.446e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 349 (approx. per word bound = -5.746, relative change = 6.501e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 350 (approx. per word bound = -5.746, relative change = 5.803e-05) 
## Topic 1: get, new, laws, right, country 
##  Topic 2: life, better, done, worry, us 
##  Topic 3: americans, security, illegals, jobs, social 
##  Topic 4: immigrants, english, many, economy, learn 
##  Topic 5: illegal, immigration, welfare, crime, legal 
##  Topic 6: free, things, entering, usa, american 
##  Topic 7: taxes, pay, care, health, take 
##  Topic 8: think, immigration, need, come, legally 
##  Topic 9: mexico, country, immigrants, people, usa 
##  Topic 10: people, us, coming, country, work 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 351 (approx. per word bound = -5.746, relative change = 5.027e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 352 (approx. per word bound = -5.746, relative change = 4.560e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 353 (approx. per word bound = -5.745, relative change = 3.799e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 354 (approx. per word bound = -5.745, relative change = 3.271e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 355 (approx. per word bound = -5.745, relative change = 2.845e-05) 
## Topic 1: get, new, laws, right, country 
##  Topic 2: life, better, done, worry, us 
##  Topic 3: americans, security, illegals, jobs, social 
##  Topic 4: immigrants, english, many, economy, learn 
##  Topic 5: illegal, immigration, welfare, crime, legal 
##  Topic 6: free, things, usa, entering, american 
##  Topic 7: taxes, pay, care, health, take 
##  Topic 8: think, immigration, need, legally, country 
##  Topic 9: mexico, country, immigrants, people, usa 
##  Topic 10: people, us, coming, country, work 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 356 (approx. per word bound = -5.745, relative change = 2.446e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 357 (approx. per word bound = -5.745, relative change = 2.257e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 358 (approx. per word bound = -5.745, relative change = 2.316e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 359 (approx. per word bound = -5.744, relative change = 2.641e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 360 (approx. per word bound = -5.744, relative change = 2.858e-05) 
## Topic 1: get, new, come, laws, country 
##  Topic 2: life, better, done, worry, us 
##  Topic 3: americans, security, illegals, jobs, social 
##  Topic 4: immigrants, english, many, economy, tax 
##  Topic 5: illegal, immigration, welfare, crime, legal 
##  Topic 6: free, things, usa, entering, american 
##  Topic 7: taxes, pay, care, health, take 
##  Topic 8: think, immigration, need, legally, country 
##  Topic 9: mexico, country, immigrants, people, usa 
##  Topic 10: people, us, coming, country, work 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 361 (approx. per word bound = -5.744, relative change = 3.226e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 362 (approx. per word bound = -5.744, relative change = 3.457e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 363 (approx. per word bound = -5.744, relative change = 3.792e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 364 (approx. per word bound = -5.743, relative change = 3.977e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 365 (approx. per word bound = -5.743, relative change = 3.792e-05) 
## Topic 1: get, new, come, country, laws 
##  Topic 2: life, better, done, us, worry 
##  Topic 3: americans, security, illegals, jobs, social 
##  Topic 4: immigrants, english, many, economy, tax 
##  Topic 5: illegal, immigration, welfare, crime, legal 
##  Topic 6: free, things, entering, usa, american 
##  Topic 7: taxes, pay, care, health, take 
##  Topic 8: think, immigration, need, legally, country 
##  Topic 9: mexico, country, immigrants, people, usa 
##  Topic 10: people, us, coming, country, work 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 366 (approx. per word bound = -5.743, relative change = 3.218e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 367 (approx. per word bound = -5.743, relative change = 2.653e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 368 (approx. per word bound = -5.743, relative change = 2.169e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 369 (approx. per word bound = -5.743, relative change = 1.721e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 370 (approx. per word bound = -5.743, relative change = 1.383e-05) 
## Topic 1: get, new, come, country, laws 
##  Topic 2: life, better, done, us, worry 
##  Topic 3: americans, security, illegals, jobs, social 
##  Topic 4: immigrants, english, many, economy, tax 
##  Topic 5: illegal, immigration, welfare, crime, legal 
##  Topic 6: free, things, entering, usa, american 
##  Topic 7: taxes, pay, care, health, take 
##  Topic 8: think, immigration, need, legally, country 
##  Topic 9: mexico, country, immigrants, people, english 
##  Topic 10: people, us, coming, country, work 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Completing Iteration 371 (approx. per word bound = -5.743, relative change = 1.164e-05) 
## .................................................................................................................
## Completed E-Step (0 seconds). 
## Completed M-Step. 
## Model Converged

Interpreting results

labelTopics(gad_stm_1)
## Topic 1 Top Words:
##       Highest Prob: get, new, come, country, laws, right, nation 
##       FREX: new, amount, right, learning, laws, nation, know 
##       Lift: congress, lobbyists, required, -english, -jobs, -more, -us 
##       Score: new, amount, right, laws, support, know, congress 
## Topic 2 Top Words:
##       Highest Prob: life, better, done, us, worry, citizens, immigration 
##       FREX: another, im, done, life, better, major, wall 
##       Lift: abroad, accross, alilens, anymore.and, attack, bank, became 
##       Score: life, im, better, assimilate, another, family, wall 
## Topic 3 Top Words:
##       Highest Prob: americans, security, illegals, jobs, social, healthcare, cost 
##       FREX: healthcare, security, americans, social, mexicans, illegals, cost 
##       Lift: act, activity, allegiance, along, amounts, annoying, began 
##       Score: security, healthcare, americans, social, cost, mexicans, jobs 
## Topic 4 Top Words:
##       Highest Prob: immigrants, english, many, economy, tax, paid, taking 
##       FREX: immigrants, economy, tax, just, paid, english, taking 
##       Lift: #2, allour, anymore, bennefit, bother, cities, collect 
##       Score: immigrants, just, tax, economy, population, many, paid 
## Topic 5 Top Words:
##       Highest Prob: illegal, immigration, welfare, crime, legal, jobs, services 
##       FREX: illegal, welfare, hospitals, fences, services, paying, crime 
##       Lift: =, average, barriers, bigger, boarders, bums, car 
##       Score: illegal, hospitals, crime, fences, schools, services, loss 
## Topic 6 Top Words:
##       Highest Prob: free, things, entering, usa, american, care, immigrants 
##       FREX: ride, things, free, entering, usa, bring, medical 
##       Lift: accomodated, accomodating, accountability, agreed, amoung, ancious, anxious 
##       Score: causing, failure, politicians, values, wonder, illegaly, recieve 
## Topic 7 Top Words:
##       Highest Prob: taxes, pay, care, health, take, language, money 
##       FREX: taxes, pay, health, take, care, education, money 
##       Lift: abuses, access, allowed, america's, american's, americanized, asians 
##       Score: pay, taxes, care, health, money, education, take 
## Topic 8 Top Words:
##       Highest Prob: think, immigration, need, legally, country, live, much 
##       FREX: think, much, live, well, legally, need, immigration 
##       Lift: -finding, actually, afraid, altime, americas, arent, artificially 
##       Score: think, well, much, fair, countries, immigration, process 
## Topic 9 Top Words:
##       Highest Prob: mexico, country, immigrants, people, english, usa, illegal 
##       FREX: else, mexico, close, lived, needs, wage, one 
##       Lift: abolition, abused, accomplish, activities, alternative, among, assumption 
##       Score: close, mexico, else, term, used, usa, developing 
## Topic 10 Top Words:
##       Highest Prob: people, us, coming, country, work, jobs, back 
##       FREX: back, coming, us, people, illegally, send, poor 
##       Lift: nothing, back, affects, amercia, asked, asylum, basis 
##       Score: people, send, us, coming, back, illegally, worries
# formatting the plot (optional)
par(bty="n",col="grey40",lwd=5)
# plotting
plot(gad_stm_1,topics=1:5,type="summary",xlim=c(0,0.2))

labelTopics(gad_stm_1,topics=3)
## Topic 3 Top Words:
##       Highest Prob: americans, security, illegals, jobs, social, healthcare, cost 
##       FREX: healthcare, security, americans, social, mexicans, illegals, cost 
##       Lift: act, activity, allegiance, along, amounts, annoying, began 
##       Score: security, healthcare, americans, social, cost, mexicans, jobs
findThoughts(gad_stm_1, gadarian$open.ended.response, topics=3, n=10)
## 
##  Topic 3: 
##       robbing americans of their social security; rising costs of social programs to cover illegals; rising costs of incarceration due to illegals; not being able to understand what they are saying (spanish and other languages); the fact that illegal immigrants are here with their children who go through our school systems then cannot get financial aid for college because their parents never filed for naturalization leaving the kids to work dead end jobs and never get naturalized; the fact that they are doing the work that americans don't want to do anyway, and then the americans complain about it; border walls; increasing amounts of drugs in america because it is so easy to get into our country
##      i want illegals gone.  they cost my husband his business.  they come here undercut the americans, and then raise their prices after they've driven hard working americans out of their jobs.
##      migrant workers, mexicans, green cards, passports, border security, people willing to do jobs most americans don't want, multi-lingual culture, ignorance, fear, hypocrisy of americans
##      the cost of living, cost of food, diseases, and jobs that are taken from americans.
##      lack of jobs for americans
## terrorist activity
##      illegals; social security; benefits
##      a bible verse (send me your weak and hungry) and a one way door
##      violence, drugs, jobs lost
##      border security is lacking. 
## mexicans have no regard for our system of law.
## washington has let illegal immigration go on, too long
##      the construction of the fence along the border. the deaths of people smuggled into the us in unventilated trucks.  people starving or freezing to death in the desert

Prevalence and Content covariates

gad_stm_2 <- stm(gadarian_dfm,K=10,
                 prevalence=~treatment,
                 data=docvars(gadarian_dfm),verbose=F)

labelTopics(gad_stm_2)
## Topic 1 Top Words:
##       Highest Prob: get, new, come, country, laws, right, immigration 
##       FREX: new, amount, right, learning, laws, nation, know 
##       Lift: -english, -jobs, -more, -us, aboration, accidents, actively 
##       Score: new, amount, right, laws, support, congress, lobbyists 
## Topic 2 Top Words:
##       Highest Prob: life, better, done, government, immigration, assimilate, another 
##       FREX: another, im, done, life, major, wall, better 
##       Lift: abroad, accross, alilens, ancestors, another, anymore.and, attack 
##       Score: im, life, family, assimilate, better, another, wanting 
## Topic 3 Top Words:
##       Highest Prob: jobs, americans, security, illegals, social, etc, healthcare 
##       FREX: healthcare, violence, security, americans, social, jobs, illegals 
##       Lift: activity, allegiance, along, amounts, annoying, b, began 
##       Score: security, jobs, americans, social, healthcare, cost, illegals 
## Topic 4 Top Words:
##       Highest Prob: immigrants, many, economy, english, tax, paid, taking 
##       FREX: economy, tax, immigrants, paid, just, population, taking 
##       Lift: #2, act, anymore, bennefit, bother, cities, collect 
##       Score: immigrants, tax, just, population, giving, many, paid 
## Topic 5 Top Words:
##       Highest Prob: illegal, immigration, welfare, legal, crime, paying, services 
##       FREX: illegal, hospitals, fences, paying, services, unfair, welfare 
##       Lift: =, allour, availability, average, barriers, bigger, boarders 
##       Score: illegal, hospitals, fences, crime, services, =, vs 
## Topic 6 Top Words:
##       Highest Prob: free, things, american, entering, care, ride, usa 
##       FREX: ride, things, free, entering, medical, bring, usa 
##       Lift: accomodated, accomodating, accountability, agreed, amoung, ancious, anxious 
##       Score: failure, politicians, values, causing, wonder, illegaly, ride 
## Topic 7 Top Words:
##       Highest Prob: taxes, pay, care, health, take, language, money 
##       FREX: pay, taxes, health, care, take, education, money 
##       Lift: abuses, access, allowed, america's, american's, americanized, asians 
##       Score: pay, taxes, care, health, money, take, unemployment 
## Topic 8 Top Words:
##       Highest Prob: think, immigration, need, immigrants, legally, country, much 
##       FREX: think, much, well, need, fine, fair, legally 
##       Lift: -finding, actually, afraid, altime, americas, arent, artificially 
##       Score: think, well, much, fair, need, process, takes 
## Topic 9 Top Words:
##       Highest Prob: mexico, country, immigrants, english, people, usa, learn 
##       FREX: else, mexico, close, increase, one, needs, usa 
##       Lift: abolition, abused, accomplish, activities, adjust, agree, almost 
##       Score: close, mexico, else, term, used, developing, usa 
## Topic 10 Top Words:
##       Highest Prob: people, us, coming, country, work, come, jobs 
##       FREX: coming, us, people, back, illegally, less, send 
##       Lift: affects, amercia, asked, asylum, back, basis, bc 
##       Score: people, send, us, coming, back, illegally, worries
gad_stm_3 <- stm(gadarian_dfm,K=10,
                 content=~treatment,
                 data=docvars(gadarian_dfm),verbose=F)
labelTopics(gad_stm_3,topics=3)
## Topic Words:
##  Topic 3: systems, america, americans, social, much, one, country 
##  
##  Covariate Words:
##  Group 0: themsleves, allour, assistance, finincal, imigerants, subsidize, cheap 
##  Group 1: large 
##  
##  Topic-Covariate Interactions:
##  Topic 3, Group 0: stop, immagrants, =, higher, students, unattainable, mexicans 
##  Topic 3, Group 1: usa, entering, history, politicians, crime, desperation, accountability 
## 

Estimation of effects

gad_est <- estimateEffect(1:10~treatment,
                          gad_stm_2,docvars(gadarian_dfm))
plot(gad_est,topics=1,covariate="treatment")

plot(gad_est,method="difference",cov.value1="0",
  cov.value2="1",covariate="treatment",topics=1)

Validation

stm_obj<- convert(gadarian_dfm,"stm")
ksearch<-searchK(stm_obj$documents,stm_obj$vocab,
                     K = seq(5, 15, by = 2), max.em.its = 15,verbose=F)
plot(ksearch)