Converting Text to Lowercase in R: A Comprehensive Guide with Pure R, Rcpp/C++, and stringi Packages

Lemmatization in R: A Step-by-Step Guide to Tokenization, Stopwords, and Aggregation for Natural Language Processing

Extracting the Top Ten Highest Column Values in a R Dataframe

Based on the provided specification, I'll write a complete R function that transforms a tdm matrix into a new matrix with an additional column representing the class of each term.