[R] A question about "union"

[Yihui Xie]

You need to get() their elements instead of merely using variable names.

Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
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On Fri, Oct 17, 2008 at 6:23 PM, Leon Yee <yee.leon at gmail.com> wrote:
> Dear all,
>
>   I have a question about "union".  "union" handles two vectors' elements to
> get their union, but I have many vectors and I want to get the union of all
> of them. So I wrote a loop:
>
> all <-c();
> for(var in ls(pattern="xyz"))
> # all of the vectors with pattern of "xyz"
> {
>   all <- union(all, var);
> }
>
>
> but the result is like this: ("xyzblabla1", "xyzblabla2", "abcxyz", ... ) --
> just a collection of the variable names, not the union of their elements.
>
> How can I solve this problem?
>
> thanks!
>
> Leon
>
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