Hi all, If I have a vector A<-1:6, I would like to convert A to an upper matrix M=[0 1 2 3 ; 0 0 4 5 ; 0 0 0 6; 0 0 0 0]. That is, if the length of the known vector is n, then the order m of the matrix I'd like to have should satisfy m(m-1)/2=n How could I do this in R? I really don't want to do it using a loop. Is there a function in R to do this ?
Thanks! Best, Zhishi ______________________________________________ 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.
