mindspore.scipy.linalg.inv
- mindspore.scipy.linalg.inv(a, overwrite_a=False, check_finite=True)[source]
Compute the inverse of a matrix.
Note
inv is not supported on Windows platform yet.
Only float32, float64, int32, int64 are supported Tensor dtypes. If Tensor with dtype int32 or int64 is passed, it will be cast to
mstype.float64
.
- Parameters
a (Tensor) – Square matrix to be inverted.
overwrite_a (bool, optional) – Discard data in a (may improve performance). Default: False.
check_finite (bool, optional) – Whether to check that the input matrix contains only finite numbers. Disabling may give a performance gain, but may result in problems (crashes, non-termination) if the inputs do contain infinities or NaNs. Default: True.
- Returns
Tensor, inverse of the matrix a.
- Raises
LinAlgError – If \(a\) is singular.
ValueError – If \(a\) is not square, or not 2D.
- Supported Platforms:
CPU
GPU
Examples
>>> import numpy as onp >>> from mindspore.common import Tensor >>> import mindspore.numpy as mnp >>> from mindspore.scipy.linalg import inv >>> a = Tensor(onp.array([[1., 2.], [3., 4.]])) >>> print(inv(a)) [[-2. 1. ] [ 1.5 -0.5]] >>> print(mnp.dot(a, inv(a))) [[1.0000000e+00 0.0000000e+00] [8.8817842e-16 1.0000000e+00]]