红宝石 |矩阵对角线（）函数

对角线是 Ruby 中的一个内置方法，它返回一个以对角线元素作为给定值的矩阵。

Syntax: mat1.diagonal(val1, val2, val3 …)

Parameters: The function accepts the values which are to be placed in the diagonal of the matrix.

Return Value: It returns matrix with values val1, val2, val3, and others placed in diagonals.

示例 1 ：

# Ruby program for diagonal() method in Matrix
   
# Include matrix 
require "matrix"
   
# Initialize a matrix
# using diagonal method 
mat1 = Matrix.diagonal(1, 6, 9)
   
# Print the matrix
puts mat1

输出：

Matrix[[1, 0, 0], [0, 6, 0], [0, 0, 9]]

示例 2 ：

# Ruby program for diagonal() method in Matrix
   
# Include matrix 
require "matrix"
   
# Initialize a matrix
# using diagonal method 
mat1 = Matrix.diagonal(2, 7)
   
# Print the matrix
puts mat1

输出：

Matrix[[2, 0], [0, 7]]