helloplease I want to make a sustration of two vectors of a matrix i have this program
aa<-matrix(outer(0:3,0:4,function(x,y) x+y*2),nrow=4,ncol=5) for(i in 1:4) + {for(j in 2:5) + {bb[i,j-1]=aa[i,j]-aa[i,j-1] + } + } at the end i obtain the bb=matrix( nrow=4,ncol=4) but i cann't obtain this matrix thank you very much [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.