[R] A question about "union"

[Peter Dalgaard]

Leon Yee 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?
>

This has nothing to do with union()  and everything to do with get(). So
read the help page of the latter.

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