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