Returns the upper triangle of a matrix, excluding the main diagonal
UPTRIX(a)
a |
- |
A matrix. |
An array of size(a) consisting of the upper triangle of a, excluding the main diagonal, with the other elements set to 0.
W1: ones(3)
W2: uptrix(W1)
W2 == {{0, 1, 1},
{0, 0, 1},
{0, 0, 0}}
UPTRIX excludes the main diagonal. Use UPTRI to include the main diagonal.
Use TRIU to return the upper matrix above a specified diagonal.