identity(n, dtype='d', format=None)

Returns an identity matrix with shape (n,n) using a given sparse format and dtype.

Parameters

n : int

Shape of the identity matrix.

dtype : dtype, optional

Data type of the matrix

format : str, optional

Sparse format of the result, e.g., format="csr", etc.

Identity matrix in sparse format

Examples

>>> from scipy.sparse import identity
... identity(3).toarray()
array([[ 1.,  0.,  0.],
       [ 0.,  1.,  0.],
       [ 0.,  0.,  1.]])

>>> identity(3, dtype='int8', format='dia')
<3x3 sparse matrix of type '<class 'numpy.int8'>'
        with 3 stored elements (1 diagonals) in DIAgonal format>

See :

Back References

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scipy.sparse._construct.identity

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GitHub : /scipy/sparse/_construct.py#192
type: <class 'function'>
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