mindspore.ops.triu

mindspore.ops.triu(input, diagonal=0)[source]

Returns the upper triangle part of ‘input’ (elements that contain the diagonal and below), and set the other elements to zeros.

Warning

This is an experimental API that is subject to change or deletion.

Parameters

input (Tensor) – The input tensor with shape \((M, N, *)\) where * means any number of additional dimensions.
diagonal (int, optional) – An optional attribute indicates the diagonal to consider, default: 0, indicating the main diagonal.

Returns

Tensor, a tensor has the same shape and data type as input.

Raises

TypeError – If diagonal is not an int.
TypeError – If input is not a Tensor.
ValueError – If the dimension of input is less than 2.

Supported Platforms:: Ascend GPU CPU

Examples

>>> import numpy as np
>>> from mindspore import Tensor, ops
>>> x = Tensor(np.array([[ 1,  2,  3,  4],
...                      [ 5,  6,  7,  8],
...                      [10, 11, 12, 13],
...                      [14, 15, 16, 17]]))
>>> result = ops.triu(x)
>>> print(result)
[[ 1  2  3  4]
 [ 0  6  7  8]
 [ 0  0 12 13]
 [ 0  0  0 17]]
>>> x = Tensor(np.array([[ 1,  2,  3,  4],
...                      [ 5,  6,  7,  8],
...                      [10, 11, 12, 13],
...                      [14, 15, 16, 17]]))
>>> result = ops.triu(x, diagonal=1)
>>> print(result)
[[ 0  2  3  4]
 [ 0  0  7  8]
 [ 0  0  0 13]
 [ 0  0  0  0]]
>>> x = Tensor(np.array([[ 1,  2,  3,  4],
...                      [ 5,  6,  7,  8],
...                      [10, 11, 12, 13],
...                      [14, 15, 16, 17]]))
>>> result = ops.triu(x, diagonal=-1)
>>> print(result)
[[ 1  2  3  4]
 [ 5  6  7  8]
 [ 0 11 12 13]
 [ 0  0 16 17]]