Thanks! Allen
On Nov 9, 2007 11:34 PM, Gabor Grothendieck <[EMAIL PROTECTED]> wrote: > Or perhaps: > > A[, seq(1, ncol(A), 2)] > > > On Nov 9, 2007 11:25 PM, Julian Burgos <[EMAIL PROTECTED]> wrote: > > No problem. Actually, I missed a comma. You should do > > > > A[,seq(1,dim(A)[2],2)] > > > > Julian > > > > > > > > affy snp wrote: > > > Hi Julian, > > > > > > Thanks for the help! > > > > > > Best, > > > Allen > > > > > > > > > > > > On Nov 9, 2007 11:08 PM, Julian Burgos <[EMAIL PROTECTED]> wrote: > > > > > >> There are many ways. For example, you can do something like > > >> > > >> A[seq(1,dim(A)[2],2)] > > >> > > >> Julian > > >> > > >> Julian M. Burgos > > >> > > >> Fisheries Acoustics Research Lab > > >> School of Aquatic and Fishery Science > > >> University of Washington > > >> > > >> 1122 NE Boat Street > > >> Seattle, WA 98105 > > >> > > >> Phone: 206-221-6864 > > >> > > >> > > >> > > >> > > >> affy snp wrote: > > >> > > >>> Dear List, > > >>> > > >>> Hi! I am wondering what is the simplest way to subset a portion of > > >>> columns > > >>> from a matrix. > > >>> > > >>> For example, there is a matrix A (238,304*243). What is the simplest > > >>> way to get a sub-matrix B which comprises of column 1, 3, 5, > > >>> 7,9,...(odd column > > >>> number) from matrix A? > > >>> > > >>> Thank you very much for your help! > > >>> > > >>> Best, > > >>> Allen > > >>> > > >>> ______________________________________________ > > >>> R-help@r-project.org mailing list > > >>> https://stat.ethz.ch/mailman/listinfo/r-help > > >>> PLEASE do read the posting guide > > >>> http://www.R-project.org/posting-guide.html > > >>> and provide commented, minimal, self-contained, reproducible code. > > >>> > > >>> > > >> > > >> > > >> > > > > -- > > Julian M. Burgos > > > > Fisheries Acoustics Research Lab > > School of Aquatic and Fishery Science > > University of Washington > > > > 1122 NE Boat Street > > Seattle, WA 98105 > > > > Phone: 206-221-6864 > > > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
