Rough sets in R [closed]

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Do you know any R packages implementing rough set based methods? I believe the answer is there are no, 开发者_如何学Gobut maybe I am missing something subtle.

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A quick search with Rseek reveals that there was a talk on this subject presented at the useR! 2004 conference. The abstract mentions an R package, however the package does not appear on CRAN or the authors' personal web pages.

Update: as noted by @ManuParra in the comments below, there is now an R package, RoughSets, implementing algorithms for data analysis using rough set theory.