Generalization of the plot function to 
  work on a list of LDA topic models (class LDA_set).
# S3 method for LDA_set plot(x, ...)
| x | An  | 
|---|---|
| ... | Additional arguments to be passed to subfunctions. | 
NULL.
# \donttest{ data(rodents) lda_data <- rodents$document_term_table r_LDA <- LDA_set(lda_data, topics = 2, nseeds = 2) plot(r_LDA) # }