Dear
How do you construct a lower triangular matrix from a vector.
I want to make vector
a <- 1:10
into a triangular matrix
1 0 0 0
2 3 0 0
4 5 6 0
7 8 9 10
Thank you!
[[alternative HTML version deleted]]
______________________________________________
[email protected] 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.
