Ruby | Matrix first_minor() function Last Updated : 29 Aug, 2021 Improve Improve Like Article Like Save Share Report 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]] Like Article Suggest improvement Previous Ruby | Matrix identity() function Next Ruby | Matrix hash() function Share your thoughts in the comments Add Your Comment Please Login to comment...