Ruby | Matrix identity() function

Last Updated : 12 Jul, 2025
The identity() is an inbuilt method in Ruby returns an Identity matrix of N X N size.
Syntax: mat1.identity(N) Parameters: The function accepts a mandatory parameter N which is the size of the Identity matrix. Return Value: It returns the Identity matrix.
Example 1: Ruby 
# Ruby program for identity() method in Matrix

# Include matrix 
require "matrix"

# Initialize a matrix
# using identity method 
mat1 = Matrix.identity(2)

# Print the matrix
puts mat1
Output: 
Matrix[[1, 0], [0, 1]]
Example 2: Ruby 
# Ruby program for identity() method in Matrix

# Include matrix 
require "matrix"

# Initialize a matrix
# using identity method 
mat1 = Matrix.identity(3)

# Print the matrix
puts mat1
Output: 
Matrix[[1, 0, 0], [0, 1, 0], [0, 0, 1]]
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Article Tags:
Ruby
Ruby-Methods
Ruby Matrix-class

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