On Thu, May 03, 2012 at 09:07:39PM -0400, li li wrote:
> Hi all,
>I have a 100 by 100 matrix and I divided this matrix into 100 groups,
> each is a
> 10 by 10 submatrix. I want find out the means of each group.
>I know we can use apply function for mean by margins. Is there a
> function i
Hi all,
I have a 100 by 100 matrix and I divided this matrix into 100 groups,
each is a
10 by 10 submatrix. I want find out the means of each group.
I know we can use apply function for mean by margins. Is there a
function in R for
means by groups also? Thanks.
Hannah
[[alter
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