Finding 2 & 3 word Phrases Using R TM Package

Question

I am trying to find a code that actually works to find the most frequently used two and three word phrases in R text mining package (maybe there is another package for it th

Answer 1

This is part 5 of the FAQ of the tm package:

5. Can I use bigrams instead of single tokens in a term-document matrix?

Yes. RWeka provides a tokenizer for arbitrary n-grams which can be directly passed on to the term-document matrix constructor. E.g.:

  library("RWeka")
  library("tm")

  data("crude")

  BigramTokenizer <- function(x) NGramTokenizer(x, Weka_control(min = 2, max = 2))
  tdm <- TermDocumentMatrix(crude, control = list(tokenize = BigramTokenizer))

  inspect(tdm[340:345,1:10])