tm: read in data frame, keep text id's, construct DTM and join to other dataset

Question

I\'m using package tm.

Say I have a data frame of 2 columns, 500 rows. The first column is ID which is randomly generated and has both character and number in it: \"

Answer 1

In the code below, "content" should be lower case, not upper case as in the example below. This change will correctly populate the content field of the corpus.

require(tm)
m <- list(ID = "ID", content = "txt")
myReader <- readTabular(mapping = m)
mycorpus <- Corpus(DataframeSource(df), readerControl = list(reader = myReader))

# Manually keep ID information from http://stackoverflow.com/a/14852502/1036500
for (i in 1:length(mycorpus)) {
  attr(mycorpus[[i]], "ID") <- df$ID[i]
}

Now Try

mycorpus[[3]]$content