This is documentation for an old release of NumPy (version 1.18). Read this page Search for this page in the documentation of the latest stable release (version 2.2).

numpy.mat

numpy.mat(data, dtype=None)

Interpret the input as a matrix.

Unlike matrix, asmatrix does not make a copy if the input is already a matrix or an ndarray. Equivalent to matrix(data, copy=False).

Parameters

dataarray_like

Input data.

dtypedata-type

Data-type of the output matrix.

Returns

matmatrix

data interpreted as a matrix.

Examples

>>>

>>> x = np.array([[1, 2], [3, 4]])

>>>

>>> m = np.asmatrix(x)

>>>

>>> x[0,0] = 5

>>>

>>> m
matrix([[5, 2],
        [3, 4]])