[R] using pmax in presence of NAs
sarah.goslee at gmail.com
Wed Nov 16 22:06:03 CET 2016
pmax has a na.rm argument. Why not just use that?
x <- data.frame(a = c(1:5), b=11:15, c=c(111:114,NA))
> do.call(pmax, c(x, na.rm=TRUE))
 111 112 113 114 15
On Wed, Nov 16, 2016 at 3:58 PM, Dimitri Liakhovitski
<dimitri.liakhovitski at gmail.com> wrote:
> I need to calculate the maximum of each row of a data frame.
> This works:
> x <- data.frame(a = 1:5, b=11:15, c=111:115)
> do.call(pmax, x)
>  111 112 113 114 115
> However, how should I modify it if my data frame has NAs?
> I'd like it to ignore NAs and return the maximum of all non-NAs in each row:
> x <- data.frame(a = c(1:5), b=11:15, c=c(111:114,NA))
> I'd like it to return:
>  111 112 113 114 15
> Thanks a lot!
> Dimitri Liakhovitski
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