Rough sets in R -

Do you apply any R packages unformatted set based methods? I believe this is not an answer, but maybe I'm missing some fine.

A quick search indicates that a topic was discussed on this topic. An R package is mentioned, however the package does not appear on the CRAN or the personal of the authors.

Update: As noted in the comments below @ManuParra, now a package, implementing algorithms for data analysis using some set theory .