R help - Mar 2005 - How to split a single vector into a multiple-column and multiple-row matrix

Dear List,

I have, say, a 2000x1 numeric vector and would like to
split it into, say, a 200x10 matrix.  Any help is
appreciated.

You can use 'matrix()', as in

x <- 1:2000
matrix(x, nrow = 200, ncol = 10)

-roger

R_xprt_wannabe wrote:
> Dear List,
> 
> I have, say, a 2000x1 numeric vector and would like to
> split it into, say, a 200x10 matrix.  Any help is
> appreciated.
> 
> ______________________________________________
> R-help at 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
> 
-- 
Roger D. Peng
http://www.biostat.jhsph.edu/~rpeng/

x <- rnorm(2000)

dim(x) <- c(200, 10)
## or if you want it by row:
matrix(x, 200, 10, TRUE)


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


----- Original Message ----- 
From: "R_xprt_wannabe" <r_xprt_wannabe at yahoo.com>
To: <r-help at stat.math.ethz.ch>
Sent: Friday, March 25, 2005 4:12 PM
Subject: [R] How to split a single vector into a multiple-column 
andmultiple-row matrix

> Dear List,
>
> I have, say, a 2000x1 numeric vector and would like to
> split it into, say, a 200x10 matrix.  Any help is
> appreciated.
>
> ______________________________________________
> R-help at 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
>