Compares the rows of two data-frames and reports add, removed and changed rows.
The latest development version is available from http://enricoschumann.net/R/packages/ddf/ . You can install either version directly from within R:
install.packages('ddf', ## development version
repos = c('http://enricoschumann.net/R',
getOption('repos')))
There are also a publicly-available source-code repository at https://git.sr.ht/~enricoschumann/ddf.