dtm_wordcloud {corpustools}

Plot a word cloud from a dtm

Description

Compute the term frequencies for the dtm and plot a word cloud with the top n topics You can either supply a document-term matrix or provide terms and freqs directly (in which case this is an alias for wordcloud::wordcloud with sensible defaults)

Usage

dtm_wordcloud(
  dtm = NULL,
  nterms = 100,
  freq.fun = NULL,
  terms = NULL,
  freqs = NULL,
  scale = c(4, 0.5),
  min.freq = 1,
  rot.per = 0.15,
  ...
)

Arguments

dtm

the document-term matrix

nterms

the amount of words to plot (default 100)

freq.fun

if given, will be applied to the frequenies (e.g. sqrt)

terms

the terms to plot, ignored if dtm is given

freqs

the frequencies to plot, ignored if dtm is given

scale

the scale to plot (see wordcloud::wordcloud)

min.freq

the minimum frquency to include (see wordcloud::wordcloud)

rot.per

the percentage of vertical words (see wordcloud::wordcloud)

...

other arguments passed to wordcloud::wordcloud

Examples

## create DTM
tc = create_tcorpus(sotu_texts[1:100,], doc_column = 'id')
tc$preprocess('token', 'feature', remove_stopwords = TRUE)
dtm = get_dtm(tc, 'feature')


dtm_wordcloud(dtm, nterms = 20)

## or without a DTM
dtm_wordcloud(terms = c('in','the','cloud'), freqs = c(2,5,10))