[R] Splitting 3D matrix from for loop to generate/save 2D matrices

[Michael Bedward]

Hi Hana,

Use the paste function to create your file names.

for ( i in 1:dim(M)[1] ) save( M[i,,], file=paste("M_", i, ".img", sep="") )

Alternatively, use the sprintf function to get names with leading
zeroes for easier sorting of files:

for (i in 1:dim(M)[1] ) save( M[i,,], file=sprintf("M_%03d.img", i) )

Michael


On 22 November 2010 16:27, Hana Lee <hanalee at email.unc.edu> wrote:
> Hi!
>
> I have a matrix called M with dimension (586,100,100). I would like to split
> and save this into 586 matrices with dimension 100 by 100.
> I have tried the following for loops but couldn't get it work..
>
> l<-dim(M)[1]
> for (i in (1:l)){
> save(M[i,,],file = "M_[i].img")
> }
>
> Can somebody help me with this? Thanks!
>
> Hana Lee
>
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