[R] delete selecting rows and columns

jastar mswierniak at o2.pl
Tue Mar 6 08:46:54 CET 2007


I mean something like in MATLAB matrix(sel_r,:)=[]


jastar wrote:
> 
> Hi,
> I'm working with a big square matrix (15k x 15k) and I have some trouble.
> I want to delete selecting rows and columns.
> I'm using something like this:
> 
>> sel_r=c(15,34,384,985,4302,6213)
>> sel_c=c(3,151,324,3384,7985,14302)
>> matrix=matrix[-sel_r,-sel_c]
> 
> but it works very slow.
> Does anybody know how to make it in faster way?
> Thank's
> 

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