mindspore.Tensor.trace

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Tensor.trace(offset=0, axis1=0, axis2=1, dtype=None)[source]

Return the sum along diagonals of the tensor.

Parameters

  • offset (int, optional) – Offset of the diagonal from the main diagonal. Can be positive or negative. Defaults to main diagonal.

  • axis1 (int, optional) – Axis to be used as the first axis of the 2-D sub-arrays from which the diagonals should be taken. Defaults to first axis (0).

  • axis2 (int, optional) – Axis to be used as the second axis of the 2-D sub-arrays from which the diagonals should be taken. Defaults to second axis.

  • dtype (mindspore.dtype, optional) – defaults to None. Overrides the dtype of the output Tensor.

Returns

Tensor, the sum along diagonals.

Raises

ValueError – If the input tensor has less than two dimensions.

Supported Platforms:

Ascend GPU CPU

See also

mindspore.Tensor.diagonal(): Return specified diagonals.

Examples

>>> import numpy as np
>>> from mindspore import Tensor
>>> x = Tensor(np.eye(3, dtype=np.float32))
>>> print(x.trace())
3.0