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Ruby | Matrix lup() function

  • Last Updated : 07 Jan, 2020

The lup() is an inbuilt method in Ruby returns the LUP decomposition of the given matrix.

Syntax: mat1.lup()

Parameters: The function needs the matrix whose LUP decomposition is to be returned.

Return Value: It returns the LUP decomposition of the matrix.

Example 1:






#Ruby program for lup() method in Matrix
  
#Include matrix
require "matrix"
  
#Initialize a matrix
    mat1
    = Matrix[[ 1, 21 ], [ 31, 18 ]]
  
#Prints the decomposition
      puts mat1.lup()

Output:

Matrix[[1, 0], [1/31, 1]]
Matrix[[31, 18], [0, 633/31]]
Matrix[[0, 1], [1, 0]]

Example 2:




#Ruby program for lup() method in Matrix
  
#Include matrix
require "matrix"
  
#Initialize a matrix
    mat1
    = Matrix[[ 1, 0, 0 ], [ 2, 3, 0 ], [ 31, 18, 19 ]]
  
#Prints the decomposition
      puts mat1.lup()

Output:

Matrix[[1, 0, 0], [2/31, 1, 0], [1/31, -6/19, 1]]
Matrix[[31, 18, 19], [0, 57/31, -38/31], [0, 0, -1/1]]
Matrix[[0, 0, 1], [0, 1, 0], [1, 0, 0]]
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