[R] using pmax in presence of NAs

[Sarah Goslee]

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))
[1] 111 112 113 114  15

On Wed, Nov 16, 2016 at 3:58 PM, Dimitri Liakhovitski
<dimitri.liakhovitski at gmail.com> wrote:
> Hello!
>
> 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)
>   x
>   do.call(pmax, x)
> [1] 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))
>   x
> I'd like it to return:
> [1] 111 112 113 114 15
>
> Thanks a lot!
>
> --
> Dimitri Liakhovitski
>