红宝石 |矩阵 tr()函数
tr()是Ruby 中的一个内置方法,它返回轨迹,即矩阵的对角线元素的总和。
Syntax: mat1.tr()
Parameters: The function needs the matrix whose trace is to be returned.
Return Value: It returns the trace.
示例 1 :
# Ruby program for tr() method in Matrix
# Include matrix
require "matrix"
# Initialize a matrix
mat1 = Matrix[[3, 12], [2, 8]]
# Prints the trace
puts mat1.tr()
输出:
11
示例 2 :
# Ruby program for tr() method in Matrix
# Include matrix
require "matrix"
# Initialize a matrix
mat1 = Matrix[[1, 0, 6], [6, 1, 7], [1, 2, 19]]
# Prints the trace
puts mat1.tr()
输出:
21