[R] generic arrays in R

[Prof Brian Ripley]

On Thu, 2 Nov 2006, Tamas K Papp wrote:

> Dear R users,
>
> Are there any generic arrays (arrays which can store arbitrary
> objects) in R?  Something along the lines of

Yes.  Arrays are vectors with dim attributes, and lists are generic 
vectors.

> f <- function(x) x^2
> a <- array(f,c(2,2))

The error message is

> f <- function(x) x^2
> a <- array(f,c(2,2))
Error in as.vector(x, mode) : cannot coerce to vector

but

a <- array(list(f),c(2,2))
a[[2,1]]

will work.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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