posterior

[reddyakilesh22]

words = posterior(m)$terms[topic, ]
Error in UseMethod("posterior") :
no applicable method for 'posterior' applied to an object of class "c('LDA_Gibbs', 'LDA', 'Gibbs', 'TopicModel')"

I'm getting an error like this. what to do? Do I have to load any more libraries?

[kasperwelbers]

That's pretty weird, because the posterior method is in the topicmodels package (see here), and you should have loaded that already to create m (LDA is also in the topicmodels packages).

Maybe your R session reset for some reason. Could you try running library(topicmodels) again?

[reddyakilesh22]

Nope, still not working. I cleared my environment and console and tried again but same error

[vanatteveldt]

It works for me:

> m = c("a text", "another text", "not very useful") %>% quanteda::dfm() %>% quanteda::convert(to="topicmodels") %>% LDA(k=2, method = "Gibbs")
Warning message:
'dfm.character()' is deprecated. Use 'tokens()' first. 
> m
A LDA_Gibbs topic model with 2 topics.
> class(m)
[1] "LDA_Gibbs"
attr(,"package")
[1] "topicmodels"
> posterior(m)
$terms
           a       text    another        not       very     useful
1 0.19642857 0.37500000 0.19642857 0.01785714 0.19642857 0.01785714
2 0.03846154 0.03846154 0.03846154 0.42307692 0.03846154 0.42307692

$topics
              1         2
text1 0.5192308 0.4807692
text2 0.5192308 0.4807692
text3 0.4905660 0.5094340

can you paste the output of sessionInfo(), the output of class(m), and the exact code you are running that produces an error?

[reddyakilesh22]

m = c("a text", "another text", "not very useful") %>% quanteda::dfm() %>% quanteda::convert(to="topicmodels") %>% LDA(k=2, method = "Gibbs")
m
A LDA_Gibbs topic model with 2 topics.
class(m)
[1] "LDA_Gibbs"
attr(,"package")
[1] "topicmodels"
posterior(m)
Error in UseMethod("posterior") :
no applicable method for 'posterior' applied to an object of class "c('LDA_Gibbs', 'LDA', 'Gibbs', 'TopicModel')"

This is the output of the above code

[vanatteveldt]

can you paste the output of sessionInfo()?

also, can you try reinstalling topicmodels?