R语言 从内存中删除对象 – rm()函数

R语言中的 rm() 函数是用来从内存中删除对象的。它可以与ls()函数一起使用来删除所有对象。remove()函数也类似于rm()函数。

语法： rm(x)

参数：

x： 对象名称

例子1 :

# R Program to remove 
# objects from Memory
  
# Creating a vector
vec <- c(1, 2, 3, 4)
vec
  
# Creating a list
list1 = list("Number" = c(1, 2, 3),
             "Characters" = c("a", "b", "c"))
list1
  
# Creating a matrix
mat <- matrix(c(1:9), 3, 3)
mat
  
# Calling rm() Function
rm(list1)
  
# Calling ls() to check object list
ls()

输出

[1] 1 2 3 4
Number
[1] 1 2 3Characters
[1] "a" "b" "c"

     [, 1] [, 2] [, 3]
[1, ]    1    4    7
[2, ]    2    5    8
[3, ]    3    6    9
[1] "mat" "vec"

例2 :

# R Program to remove 
# objects from Memory
  
# Creating a vector
vec <- c(1, 2, 3, 4)
  
# Creating a list
list1 = list("Number" = c(1, 2, 3),
             "Characters" = c("a", "b", "c"))
  
# Creating a matrix
mat <- matrix(c(1:9), 3, 3)
  
# Calling rm() Function
# to remove all objects
rm(list = ls())
  
# Calling ls() to check object list
ls()

输出

character(0)