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?
See Also

diag, matrix.

Aliases
  • lower.tri
  • upper.tri
Examples
library(base) (m2 <- matrix(1:20, 4, 5)) lower.tri(m2) m2[lower.tri(m2)] <- NA m2
Documentation reproduced from package base, version 3.1.3, License: Part of R 3.1.3

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