numpy.eye() in Python
numpy.eye() in Python: The eye() method of Python numpy class returns a 2-D array with ones on the diagonal and zeros elsewhere.
Syntax
numpy.eye(N, M=None, k=0, dtype=<class 'float'>, order='C')
Parameters
The numpy.eye() method consists of five parameters, which are as follows:
N : It represents the number of rows.
M : It represents the number of columns. It an optional argument and by default M(number of columns) = N(Number of Rows)
k : [int, optional, 0 by default] This argument represents the Diagonal. By default k=0. A positive value (k>0) refers to an upper diagonal, and a negative value(k<0) to a lower diagonal.
dtype : It is an optional parameter. It depicts the data type of returned array, and by default, it is a float.
order : The order parameter can be either C_contiguous or F_contiguous
Return Value
The numpy.eye() method returns an array of shape, R x C, where all elements are equal to zero, except for the kth diagonal, whose values are equal to one.
Example 1
# Python Programming giving an example for
# numpy.eye() method
import numpy as numpy
# 2x2 matrix with 1's on main diagonal
obj1 = numpy.eye(2, dtype = float)
print("Matrix : \n", obj1)
# matrix with Row=2 Column=3 and diagonal=1
obj2 = numpy.eye(2, 3, k = 1)
print("\nMatrix : \n", obj2)
Output
Matrix : [[ 1. 0.] [ 0. 1.]] Matrix : [[ 0. 1. 0.] [ 0. 0. 1.]]