[R] using a list to index elements of a list

[Benilton Carvalho]

if this was to work, wouldn't the object 'v' be identical to 'x'?...
so, why not use 'x' itself?
b

On Tue, Mar 23, 2010 at 2:53 PM, Pj253 <pj253 at cam.ac.uk> wrote:
>
> I have a list of vectors, x, with x[[1]]=1:5, say.
>
> And I need to go through each element of each vector in a for loop.
> Something like:
>
> for (v in x[[1]])
> print(v)
>
> However, I need to store this index "v" for later, and I have lots of other
> indices which we range over later in the code so thought I'd make a list of
> these indices, v<-list(). But then when I try:
>
> for( v[[1]] in x[[1]] )
> print(v[[1]])
>
> I get errors:
>
>> x<-list()
>> x[[1]]=1:5
>> v<-list()
>> for(v[[1]] in x[[1]])
> Error: unexpected '[[' in "for(v[["
>> print v[[1]]
> Error: unexpected symbol in "print v"
>
> Can you not use a list in this way, i.e. to store variables to range over in
> a for loop? Can anyone offer a solution?
>
> Thanks for any help!
>
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