On Friday 05 January 2007 12:34, Petr Pikal wrote: > Hi > > you could use also another approach in case of data frames > > A <- as.data.frame(A) > A0 <- -A*log(A) > A0[is.na(A0)] <- 0 I think you meant A0[which(is.na(A0))] <- 0 > > which changes NaN's to zeroes > > HTH > Petr Regards
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