numpy.matrix.I#

property

propertymatrix.I#

Returns the (multiplicative) inverse of invertibleself.

Parameters:

None

Returns:

retmatrix object

Ifself is non-singular,ret is such thatret*self ==self*ret ==np.matrix(np.eye(self[0,:].size)) all returnTrue.

Raises:

numpy.linalg.LinAlgError: Singular matrix

Ifself is singular.

See also

linalg.inv

Examples

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>>>m=np.matrix('[1, 2; 3, 4]');mmatrix([[1, 2],        [3, 4]])>>>m.getI()matrix([[-2. ,  1. ],        [ 1.5, -0.5]])>>>m.getI()*mmatrix([[ 1.,  0.], # may vary        [ 0.,  1.]])

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