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mindspore.ops.MatrixBandPart

class mindspore.ops.MatrixBandPart

Extracts the central diagonal band of each matrix in a tensor, with all values outside the central band set to zero.

Refer to mindspore.ops.matrix_band_part() for more details.

Warning

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

Inputs:

• x (Tensor) - Input tensor. $(\ast ,m,n)$ where $\ast$ means, any number of additional dimensions.

• lower (Union[int, Tensor]) - Number of subdiagonals to keep. The data type must be int32 or int64. If negative, keep entire lower triangle.

• upper (Union[int, Tensor]) - Number of superdiagonals to keep. The data type must be int32 or int64. If negative, keep entire upper triangle.

Outputs:

Tensor, has the same type and shape as x.

Supported Platforms:

Ascend GPU CPU

Examples

>>> import numpy as np
>>> from mindspore import Tensor, ops
>>> matrix_band_part = ops.MatrixBandPart()
>>> x = np.ones([2, 4, 4]).astype(np.float32)
>>> output = matrix_band_part(Tensor(x), 2, 1)
>>> print(output)
[[[1. 1. 0. 0.]
  [1. 1. 1. 0.]
  [1. 1. 1. 1.]
  [0. 1. 1. 1.]]
 [[1. 1. 0. 0.]
  [1. 1. 1. 0.]
  [1. 1. 1. 1.]
  [0. 1. 1. 1.]]]