在 R 编程中打印对象的值 – identity()函数

R 语言中的identity()函数用于打印作为参数传递给它的对象的值。

Syntax: identity(x)

Parameters:
x: An Object

示例 1：

# R program to print
# the value of an object
  
# Creating a vector
x <- c(1, 2, 3, 4)
  
# Creating a list
list1 <- list(letters[1:6]) 
  
# Calling the identity function
identity(x)
identity(list1)

输出：

[1] 1 2 3 4
[[1]]
[1] "a" "b" "c" "d" "e" "f"

示例 2：

# R program to print
# the value of an object
  
# Calling predefined data frame
x1 <- BOD
  
# Creating a matrix
mat <- matrix(c(1:9), 3, 3, byrow = T)
  
# Calling the identity() Function
identity(x1)
identity(mat)

输出：

Time demand
1    1    8.3
2    2   10.3
3    3   19.0
4    4   16.0
5    5   15.6
6    7   19.8
     [, 1] [, 2] [, 3]
[1, ]    1    2    3
[2, ]    4    5    6
[3, ]    7    8    9