On Mon, Jan 13, 2003 at 05:15:02PM +0000, juan pablo perez wrote:
> what should I do to replace in a data frame NA�s with zeroes?
I use lapply
> dd <- data.frame(a=c(1,2,NA,4),b=c(NA,2,3,4))
> dd
a b
1 1 NA
2 2 2
3 NA 3
4 4 4
> dd2 <- data.frame(lapply(dd,function(x,...){x[is.na(x)] <- 3.14159 ; x}))
> dd2
a b
1 1.00000 3.14159
2 2.00000 2.00000
3 3.14159 3.00000
4 4.00000 4.00000
That will generate a warning message for each non-numeric column in
your data frame. A tidier way is left as an exercise. ;)
Cheers
Jason
--
Indigo Industrial Controls Ltd.
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