[R] Triangular matrix upper to down
m.marcinmichal
m.marcinmichal at gmail.com
Mon Sep 26 21:50:19 CEST 2011
Hi,
suppose that we have a triangular upper matrix A
test <- matrix(ncol = 4, nrow = 4)
test[1, ] <- c(NA,1,1,1)
test[2, ] <- c(NA,NA,1,1)
test[3, ] <- c(NA,NA,NA,1)
test[4, ] <- c(NA,NA,NA,NA)
I know how quickly set diagonal value diag(test) <- 1. But how quickly set
down value i.e. matrix is symmetrical? Is there in r project any quickly
function?
Thanks,
Best
Marcin
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