On Wed, 13 Oct 2010 11:51:39 +0100
"Maas James Dr (MED)" <j.m...@uea.ac.uk> wrote:
> I've tried hard to find a way to exponentiate each element of a whole
> matrix such that if I start with A
>
> A = [ 2 3
> 2 4]
>
> I can get back B
>
> B = [ 7.38 20.08
> 7.38 54.60]
>
> I've tried
>
> B <- exp(A) but no luck.
What have you tried exactly? And with which version? This should work
with all R versions that I am familiar with, e.g.:
R> A <- matrix(c(2,2,3,4),2,2)
R> A
[,1] [,2]
[1,] 2 3
[2,] 2 4
R> B <- exp(A)
R> B
[,1] [,2]
[1,] 7.389056 20.08554
[2,] 7.389056 54.59815
Cheers,
Berwin
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