numpy.matrix.getI — NumPy v1.15 Manual (original) (raw)
Returns the (multiplicative) inverse of invertible self.
| Parameters: | None |
|---|---|
| Returns: | ret : matrix object If self is non-singular, ret is such that ret * self ==self * ret == np.matrix(np.eye(self[0,:].size) all returnTrue. |
| Raises: | numpy.linalg.LinAlgError: Singular matrix If self is singular. |
Examples
m = np.matrix('[1, 2; 3, 4]'); m matrix([[1, 2], [3, 4]]) m.getI() matrix([[-2. , 1. ], [ 1.5, -0.5]]) m.getI() * m matrix([[ 1., 0.], [ 0., 1.]])