numpy.matlib.identity

numpy.matlib.identity(n, dtype=None)[源代码]

Returns the square identity matrix of given size.

Parameters:
n : int

Size of the returned identity matrix.

dtype : data-type, optional

Data-type of the output. Defaults to float.

Returns:
out : matrix

n x n matrix with its main diagonal set to one, and all other elements zero.

参见

numpy.identity
Equivalent array function.
matlib.eye
More general matrix identity function.

Examples

>>> import numpy.matlib
>>> np.matlib.identity(3, dtype=int)
matrix([[1, 0, 0],
        [0, 1, 0],
        [0, 0, 1]])