As we have everything set up in the document-term matrix, we can move on to exploring word frequencies by creating an object with the column sums, sorted in descending order. It is necessary to use as.matrix() in the code to sum the columns. The default order is ascending, so putting - in front of freq will change it to descending:
> freq <- colSums(as.matrix(dtm)) > ord <- order(-freq)
We will examine the head and tail of the object with the following code:
> freq[head(ord)] new america people jobs now years 193 174 168 163 157 148 > freq[tail(ord)] wright written yearold youngest youngstown zero 2 2 2 2 2 2
The most frequent word is new and, as you might expect, the president mentions america frequently. ...