Ruby 矩阵cofactor_expansion()函数

cofactor_expansion() 是Ruby中的一个内置方法，用于返回给定矩阵沿给定行或列的cofactor_expansion。换句话说，它返回 **** Laplace扩展。

语法：mat1.cofactor_expansion(row: num or col:num)
参数：该函数接受一个强制性参数row或column，其cofactor_expansion被返回。
返回值 ：它返回给定矩阵沿给定行或列的cofactor-expansion。

例子 1 :

# Ruby program for cofactor_expansion() method in Matrix
 
# Include matrix
require "matrix"
 
# Initialize a matrix
mat1 = Matrix[[1, 21], [31, 18]] 
 
# Prints the value of mat1.cofactor_expansion
# first row
puts  mat1.cofactor_expansion(row:1)

输出:

-633

例2 :

# Ruby program for cofactor_expansion() method in Matrix
 
# Include matrix
require "matrix"
 
# Initialize a matrix
mat1 =  Matrix[[13, 1, 5], [12, 1, 5], [11, 2, 5]]
 
# Prints the value of mat1.cofactor_expansion
# first row
puts  mat1.cofactor_expansion(column:0)