`scipy.sparse._construct:eye`

Signature

def eye(m, n = None, k = 0, dtype = <class 'float'>, format = None)

Sparse matrix of chosen shape with ones on the kth diagonal and zeros elsewhere.

Returns a sparse matrix (m x n) where the kth diagonal is all ones and everything else is zeros.

m : int: Number of rows in the matrix.
n : int, optional: Number of columns. Default: m.
k : int, optional: Diagonal to place ones on. Default: 0 (main diagonal).
dtype : dtype, optional: Data type of the matrix.
format : str, optional: Sparse format of the result, e.g., format="csr", etc.

new_matrix : sparse matrix: Sparse matrix of chosen shape with ones on the kth diagonaland zeros elsewhere.

import numpy as np
import scipy as sp

✓

sp.sparse.eye(3).toarray()
sp.sparse.eye(3, dtype=np.int8)

✗

<DIAgonal sparse matrix of dtype 'int8'
	with 3 stored elements (1 diagonals) and shape (3, 3)>