# Ruby program for I() method in Matrix
  
# Include matrix 
require "matrix"
  
# Initialize a matrix
# using I method 
mat1 = Matrix.I(2)
  
# Print the matrix
puts mat1

Matrix[[1, 0], [0, 1]]

# Ruby program for I() method in Matrix
  
# Include matrix 
require "matrix"
  
# Initialize a matrix
# using I method 
mat1 = Matrix.I(3)
  
# Print the matrix
puts mat1

Matrix[[1, 0, 0], [0, 1, 0], [0, 0, 1]]