红宝石 |矩阵 column()函数
column()是 Ruby 中的一个内置方法,它返回一个向量,该向量包含列号 col_num 中的所有元素。
Syntax: mat1.column(col_num)
Parameters: The function accepts a parameter col_num which is the column number.
Return Value: It returns a vector which has all the elements of column col_num.
示例 1 :
# Ruby program for column() method in Matrix
# Include matrix
require "matrix"
# Initialize a matrix
mat1 = Matrix[[1, 21], [31, 18]]
# Prints the value of mat1.column
puts mat1.column(1)
输出:
Vector[21, 18]
示例 2 :
# Ruby program for column() 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.column
puts mat1.column(1)
输出:
Vector[1, 1, 2]