Get term frequencies and document frequencies from a document term matrix.

Description

This function takes a document term matrix as input and returns a data frame with columns for term frequency, document frequency, and inverse-document frequency

Usage

TermDocFreq(dtm)

Arguments

Value

Returns a data.frame or tibble with 4 columns. The first column, term is a vector of token labels. The second column, term_freq is the count of times term appears in the entire corpus. The third column doc_freq is the count of the number of documents in which term appears. The fourth column, idf is the log-weighted inverse document frequency of term.

Examples

# Load a pre-formatted dtm and topic model
data(nih_sample_dtm)
data(nih_sample_topic_model) 

# Get the term frequencies 
term_freq_mat <- TermDocFreq(nih_sample_dtm)

str(term_freq_mat)