[R] using two different matrix : how to do t.test

[Henrique Dallazuanna]

Perhaps you can try:

In two matrix 3 x 3(see 'dim' argument):

apply(array(data=c(mat1, mat2), dim=c(3,3,2)), 2,
function(x)t.test(x[,1], x[,2])$p.value)

On 19/11/2007, mogra <funnymoody999 at yahoo.com> wrote:
>
> I have two matrix with same dimensions. I want to do t.test using each column
> from 2 different matrix.
> Column names in both matrix are same.
>
> e.g.
> Matrix1
> id      VC1     VC2     VC3
> R       1       2       3
> R1      4       5       6
> R3      7       8       9
>
>
> Matrix2
> id      VC1     VC2     VC3
> R       10      11      12
> R1      13      14      15
> R3      16      17      18
>
> want to do t.test
>
> for eg t.test(Matrix1$VC1, Matrix2$VC1)$p.value
>
> What is the best way to do it. I have dataset with 4000 columns for each
> matrix with same row and column names.
>
> Thanks a lot.
> --
> View this message in context: http://www.nabble.com/using-two-different-matrix-%3A-how-to-do-t.test-tf4833943.html#a13829333
> Sent from the R help mailing list archive at Nabble.com.
>
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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O