[R] Subsetting an array by a vector of dimensions

From: Richard Pearson <richard.pearson_at_postgrad.manchester.ac.uk>
Date: Fri, 11 Jul 2008 15:53:55 +0100


Hi

Is it possible to subset an n-dimensional array by a vector of n dimensions? E.g. assume I have

> x <- array(1:24, dim=2:4)
> x[1,1,2]
[1] 7
> dims <- c(1,1,2)

I would like a function that I can supply x and dims as parameters to, and have it return 7. Also, I would like to do something like:

> x[1,1,]
[1] 1 7 13 19
> dims2<- c(1,1,NA)

And have a function of x and dims2 that gives me back [1] 1 7 13 19

Does such a thing exist?

Thanks

Richard

-- 
Richard D. Pearson             richard.pearson_at_postgrad.manchester.ac.uk
School of Computer Science,    http://www.cs.man.ac.uk/~pearsonr
University of Manchester,      Tel: +44 161 275 6178
Oxford Road,                   Mob: +44 7971 221181
Manchester M13 9PL, UK.        Fax: +44 161 275 6204

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