numpy.triu — NumPy v1.13 Manual (original) (raw)

numpy. triu(m, k=0)[source]¶

Upper triangle of an array.

Return a copy of a matrix with the elements below the _k_-th diagonal zeroed.

Please refer to the documentation for tril for further details.

See also

tril

lower triangle of an array

Examples

np.triu([[1,2,3],[4,5,6],[7,8,9],[10,11,12]], -1) array([[ 1, 2, 3], [ 4, 5, 6], [ 0, 8, 9], [ 0, 0, 12]])