On Nov 10, 2007 2:25 PM, affy snp <[EMAIL PROTECTED]> wrote:
> I am wondering how to log-2 based transform a matrix with numeric values?
> I tried > CGHlog2<-log2(CGH) but got an error. Then I found for log2(x) in R,
> the x has to be a numeric or complex vector. Any method for a matrix?
One can use log2 with matrices:
> m <- matrix(1:9,3)
> m
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
> log2(m)
[,1] [,2] [,3]
[1,] 0.000000 2.000000 2.807355
[2,] 1.000000 2.321928 3.000000
[3,] 1.584963 2.584963 3.169925
>
Paul
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