identity(n, dtype=None, *, like=None)

The identity array is a square array with ones on the main diagonal.

Parameters

n : int

Number of rows (and columns) in n x n output.

dtype : data-type, optional

Data-type of the output. Defaults to float .

like : array_like

Reference object to allow the creation of arrays which are not NumPy arrays. If an array-like passed in as like supports the __array_function__ protocol, the result will be defined by it. In this case, it ensures the creation of an array object compatible with that passed in via this argument.

versionadded

Returns

out : ndarray

n x n array with its main diagonal set to one, and all other elements 0.

Return the identity array.

Examples

>>> np.identity(3)
array([[1.,  0.,  0.],
       [0.,  1.,  0.],
       [0.,  0.,  1.]])

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

numpy.eye scipy.signal._signaltools.order_filter

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