The real() is an inbuilt method in Ruby returns a matrix with only real part in it. The other index are assigned to zero.
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Syntax: mat1.real() Parameters: The function does not takes any parameter. Return Value: It returns a matrix with only real part.Example 1:
#Ruby program for real() method in Matrix
#Include matrix
require "matrix"
#Initialize a matrix
mat1
= Matrix[[ Complex(1, 2), 21 ], [ 31, Complex(9, 12) ]]
#prints the real part
puts mat1.real()
Matrix[[1, 21], [31, 9]]Example 2:
#Ruby program for real() method in Matrix
#Include matrix
require "matrix"
#Initialize a matrix
mat1
= Matrix[[ Complex(19, 3), Complex(12, 3) ], [ Complex(7, 8), Complex(91, 2) ]]
#prints the real part
puts mat1.real()
Matrix[[19, 12], [7, 91]]