is.tril {ramify} | R Documentation |
Determine if a Matrix is Lower Triangular
is.tril(x)
x |
A matrix |
Logical indicating whether the given matrix is lower triangular.
m <- mat("1, 0, 0, 0; -1, 1, 0, 0; -2, -2, 1, 0; -3, -3, -3, 1")
is.tril(m)
is.tril(eye(3, 5))