[R] execute array of functions

[Bert Gunter]

Not sure the replies you received make it clear, but the key point is
that functions are first class objects in R like any other objects
(vectors, lists, data frames) and can be assigned, collected into
structures, indexed, etc. in the usual way. Further, if the value of
any R expression is a function object, it can be called in the usual
way on an argument list by:

Some R_Expression(comma separated argument list)

e.g.
> {y <-function(x) sin(x)+10} (pi/2) ## pi is a known named constant in R
11

Your initial confusion below actually has nothing to do with this: you
have confused unquoted names of objects in R with quoted character
strings. So, e.g.

x <- 1:10
assigns a sequence of numeric values to the name x, which essentially
points to where those values are stored in memory.

typing
>x
at the command line would print the values (by default)

typing
>"x"
prints the character string "x"

-- Bert

On Tue, Feb 14, 2012 at 11:02 AM, Muhammad Rahiz
<muhammad.rahiz at ouce.ox.ac.uk> wrote:
> 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
>
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> and provide commented, minimal, self-contained, reproducible code.



-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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