lower.tri

0th

Percentile

Lower and Upper Triangular Part of a Matrix

Returns a matrix of logicals the same size of a given matrix with entries TRUE in the lower or upper triangle.

Keywords
array
Usage
lower.tri(x, diag = FALSE)
upper.tri(x, diag = FALSE)
Arguments
x
a matrix.
diag
logical. Should the diagonal be included?
diag, matrix.
library(base) (m2 <- matrix(1:20, 4, 5)) lower.tri(m2) m2[lower.tri(m2)] <- NA m2