Not sure if this what you wanted. do.call(rbind,(matrix.list[desired.matrices])) # [,1] [,2] [,3] #[1,] 1 4 7 #[2,] 2 5 8 #[3,] 3 6 9 #[4,] 19 22 25 #[5,] 20 23 26 #[6,] 21 24 27 A.K.
________________________________ From: Heath Blackmon <[email protected]> To: [email protected] Sent: Thursday, March 7, 2013 11:52 AM Subject: [R] rbind a list of matrices I have a large list of matrices and a vector that identifies the desired matrices that I would like to rbind. However, I am stuck on how to get this to work. I have written some code below to illustrate my problem: # 3 simple matrices a<-matrix(1:9,3,3) b<-matrix(10:18,3,3) c<-matrix(19:27,3,3) #this is the type of list of matrices I am dealing with matrix.list<-vector("list",3) matrix.list[[1]]<-a matrix.list[[2]]<-b matrix.list[[3]]<-c #i have a vector that identifies the ones that i want desired.matrices <- c(1,3) #i have tried lots of things next but all fail. This one gets close but I seem to lose my dim attributes goal<-rbind(matrix.list[desired.matrices]) Any ideas would be wonderful. Thanks Heath -- *Heath Blackmon Graduate Teaching Assistant Dept of Biology - Box 19498 Univ. of Texas, Arlington Arlington, TX 76019 Office: ERB450 Phone 682-444-0538 * [[alternative HTML version deleted]] ______________________________________________ [email protected] 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. ______________________________________________ [email protected] 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.
