[R] Odp: accessing dimension names

[Petr PIKAL]

Hi

r-help-bounces at r-project.org napsal dne 18.12.2007 12:01:41:

> I have a matrix y:
> 
> > dimnames(y)
> $x93
> [1] "1" "2"
> 
> $x94
> [1] "0" "1" "2"
> .................. so on  (there are other dimensions as well)
> 
> 
> 
> I need to access a particular dimension, but a random mechanism tells me
> which dimension it would. So, sometimes I might need to access
> dimnames(y)$x93, some other time it would be dimnames(y)$x94.. and so 
on.
> Now let that random dimension be idx, then 
dimnames(y)$paste('x',idx,sep='')
> doesn't work.

Why not

dimnames(y)[idx]

Regards
Petr


> 
> Can anyone help?
> 
> Thanks!
> 
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