Rui Barradas
2014-Jan-12 22:27 UTC
[R] convert a vector to a symmetric matrix with all 0 on the diagonal
Hello, You should address your questions to R-Help, the odds of getting more and better answers are greater. As for your question, the trick is to use function ?lower.tri. (There's also an upper.tri) Something like the following. x <- 1:6 m <- matrix(0, nrow = 4, ncol = 4) m[lower.tri(m)] <- x res <- m + t(m) res Hope this helps, Rui Barradas Em 12-01-2014 21:21, yolande.tra at gmail.com escreveu:> Hi Rui, > > You might not remember me but you have been very helpful in the past wit questions related to R. I saw one of your reply about creating a lower triangular matrix from a vector. > I have a column in a data frame that I want to convert to a symmetric matrix with all 0 on the diagonal. > Could you help? > > I appreciate. > Thanks, > Yolande > > _____________________________________ > Sent from http://r.789695.n4.nabble.com >