numpy.asmatrix — NumPy v2.3.dev0 Manual (original) (raw)

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

import numpy as np x = np.array([[1, 2], [3, 4]])

m = np.asmatrix(x)

x[0,0] = 5

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