Re: [R] ifelse on data frames

From: MrJ Man <auxsvr_at_yahoo.com>
Date: Fri 05 Jan 2007 - 17:12:01 GMT


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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