numpy.asmatrix

numpy.asmatrix(data, dtype=None) [source]

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]])