Re: [R] Binary Matrices

From: Dimitris Rizopoulos <dimitris.rizopoulos_at_med.kuleuven.ac.be>
Date: Thu 14 Apr 2005 - 00:06:00 EST

you mean something like this:

matrix(sample(0:1, n*n, TRUE), n, n)

I hope it helps.

Best,
Dimitris



Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium

Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.ac.be/biostat/
     http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm


> I'm wanting to perform analysis (e.g. using eigen()) of binary
> matrices - i.e. matrices comprising 0s and 1s.
>
> For example:
>
> n<-1000
> test.mat<-matrix(round(runif(n^2)),n,n)
> eigen(test.mat,only.values=T)
>
> Is there a more efficient way of setting up test.mat, as each cell
> only requires a binary digit? I imagine R is setting up a structure
> which could contain n^2 floats.
>
> Thanks in advance for any help.
>
> Regards,
> Mark
>
>
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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Apr 14 00:15:54 2005

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