[R] Column Extraction from matrix

[Jessica Streicher]

set.seed(2)
a=matrix(rnorm(400),ncol=100)

#use a list
aList<-list()
for(i in 1:dim(a)[2]){
	aList[[i]]<-matrix(a[,i],ncol=2)
}

#get lots of variables
for(i in 1:dim(a)[2]){
	assign(paste("a",i,sep=""),matrix(a[,i],ncol=2))
}


On 16.08.2012, at 08:07, bantex wrote:

> Hi all,
> 
> I have a 4 by 100 matrix. I wish to extract each column and make it into a 2
> by 2 matrix. 
> I also want to assign names for each 2X2 matrix. 
> For example
> 
> set.seed(2)
> a=matrix(rnorm(400),ncol=100)
> a1=matrix(a[,1],ncol=2)
> a2=matrix(a[,2],ncol=2)
> .
> .
> .
> a100=matrix(a[,100],ncol=2)   
> 
> Any simple ideas. Thanks.
> 
> B
> 
> 
> 
> 
> --
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> 
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