tri(N, M=None, k=0, dtype=None)¶
An array with ones at and below the given diagonal and zeros elsewhere.
LAX-backend implementation of
Original docstring below.
N (int) – Number of rows in the array.
M (int, optional) – Number of columns in the array. By default, M is taken equal to N.
k (int, optional) – The sub-diagonal at and below which the array is filled. k = 0 is the main diagonal, while k < 0 is below it, and k > 0 is above. The default is 0.
dtype (dtype, optional) – Data type of the returned array. The default is float.
tri – Array with its lower triangle filled with ones and zero elsewhere; in other words
T[i,j] == 1for
j <= i + k, 0 otherwise.
- Return type
ndarray of shape (N, M)