红宝石 |矩阵 first_minor()函数

first_minor()是 Ruby 中的内置方法，在删除指定的行和列后返回子矩阵。

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.

示例 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)

输出：

Matrix[[12]]

示例 2 ：

红宝石

# 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)

输出：

Matrix[[9], [12]]