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Ruby | Matrix first_minor() function

  • Last Updated : 29 Aug, 2021

The first_minor() is an inbuilt method in Ruby returns the submatrix after removing the specified row and column. 
 

Syntax: mat1.first_minor(row_num, col_num)
Parameters: The function needs the row number and column number which are to be removed 
Return Value: It returns the submatrix after removal.

Example 1
 

Ruby




# Ruby program for first_minor method in Matrix
  
# Include matrix
require "matrix"
 
# Initializes the matrix
mat1 = Matrix[[12, 21], [31, 12]]
  
# Prints the submatrix after removing
puts  mat1.first_minor(1, 1)

Output
 

Matrix[[12]]

Example 2
 

Ruby




# Ruby program for first_minor method in Matrix
  
# Include matrix
require "matrix"
 
# Initializes the matrix
mat1 = Matrix[[6, 7], [9, 10], [12, 4]]
  
# Prints the submatrix after removing
puts  mat1.first_minor(0, 1)

Output
 

Matrix[[9], [12]]

 

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