On 14/02/2012 2:23 PM, Nordlund, Dan (DSHS/RDA) wrote:
> -----Original Message-----
> From: r-help-boun...@r-project.org [mailto:r-help-bounces@r-
> project.org] On Behalf Of Muhammad Rahiz
> Sent: Tuesday, February 14, 2012 11:03 AM
> To: x.r-help
> Subject: [R] execute array of functions
>
> Hi all,
>
> I'm trying to get the min and max of a sequence of number using a loop
> like the folllowing. Can anyone point me to why it doesn't work.
>
> Thanks.
>
> type <- c("min","max")
> n <- 1:10
> for (a in 1:2) {
> print(type[a](n)) }
>
>
> --
> Muhammad
>
I am not sure why you are trying to use this approach in a loop, but you need
to use the get() function if you want to do this.
type<- c("min","max")
n<- 1:10
for (a in 1:2) {
print(get(type[a])(n))
}
But, why not use min and max on n directly?
Or put min and max into the type vector, i.e.
type <- list(min, max)
n <- 1:10
for (a in 1:2) print(type[[a]](n))
Note that I need the double brackets [[a]], because type is a list.
(You can use type <- c(min, max) with the same result, but
I find using list() explicitly is easier to understand.)
Duncan Murdoch
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