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.
