Ruby | Matrix identity() function Last Updated : 12 Jul, 2025 Comments Improve Suggest changes Like Article Like Report 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]] Comment More infoAdvertise with us Next Article Ruby | Matrix imag() function G gopaldave Follow Improve Article Tags : Ruby Ruby-Methods Ruby Matrix-class Similar Reads Ruby | Matrix inv() function The inv() is an inbuilt method in Ruby returns the inverse of the given matrix. Syntax: mat1.inv() Parameters: The function does not takes any parameter. Return Value: It returns the inverse of a matrix. Example 1: CPP #Ruby program for inv() method in Matrix #Include matrix require "matrix 1 min read Ruby | Matrix I() function The I() is an inbuilt method in Ruby returns a Identity matrix of N X N size. Syntax: mat1.I(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 I() method in Matrix # I 1 min read Ruby | Matrix imag() function The imag() is an inbuilt method in Ruby returns a matrix with only imaginary part in it. The other index are assigned to zero. Syntax: mat1.imag() Parameters: The function does not takes any parameter. Return Value: It returns a matrix with only imaginary part. Example 1: CPP #Ruby program for imag( 1 min read Ruby | Matrix imaginary() function The imaginary() is an inbuilt method in Ruby returns a matrix with only imaginary part in it. The other index are assigned to zero. Syntax: mat1.imaginary() Parameters: The function does not takes any parameter. Return Value: It returns a matrix with only imaginary part. Example 1: CPP #Ruby program 1 min read Ruby | Matrix inverse() function The inverse() is an inbuilt method in Ruby returns the inverse of the given matrix. Syntax: mat1.inverse() Parameters: The function does not takes any parameter. Return Value: It returns the inverse of a matrix. Example 1: CPP #Ruby program for inverse() method in Matrix #Include matrix require 1 min read Ruby | Matrix hermitian?() function The hermitian?() is an inbuilt method in Ruby returns a boolean value. It returns true if the matrix is hermitian, else it returns false. It throws an error if anything other than a square matrix is checked for. Syntax: mat1.hermitian?() Parameters: The function needs a matrix whose hermitian is to 1 min read Like