[R] How to parse and eval a collection of items

[Gabor Grothendieck]

This does not use an apply:

unlist(mget(thels, .GlobalEnv))


On Thu, Jun 18, 2009 at 5:25 PM, Carl Witthoft<carl at witthoft.com> wrote:
> Let's say I have, for some reason, a bunch of scalars (i.e. single-valued
> variables) and I want to merge them all into a single vector of values.  Can
> someone recommend a better function, or simpler way, to do so than the
> following?
>
> Suppose my scalars' names are foo1, foo2, foo3, foo1high, foo2high, foo3lo2,
> etc.  Then I can do:
>
>
>
>>ls(pat='foo')->thels
>
>
>>mapply(function(x) eval(as.name(thels[x])),seq(1:length(thels)))->vecfoo
>
>
> I was hoping for some way to avoid creating a function and an *apply call.
>  Conceptually, eval(as.name(c(thels)))  which of course doesn't work.
>
> thanks
> Carl
>
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