[R] Breaking a matrix into parts

[Jacques VESLOT]

lapply(split(mat, gl(nrow(mat)/4, 4, nrow(mat)), cov)


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Jacques VESLOT

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SUMANTA BASAK a écrit :
> Hi, 
> I've a matrix in 20*11 order. There are 11 variables,
> i.e 11 columns and each variable have 20 row data. Now
> i want to calculate covariance between any variable
> with others taking 4 rows at a time, so that there
> will be 5 blocks. How can i do this using any
> R-function? If i want to do it in any 'loop' function?
> 
> Thanks a lot,
> SB.
> 
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