R语言 获取所有附加包的列表 – search()函数

R语言中的 search() 函数用于获取R语言搜索路径中的所有附属包的列表。

语法： search()

参数:

这个函数不需要参数。

例子1 :

# R program to list the packages
# attached to R search path
  
# Calling search() function
search()

输出

[1] ".GlobalEnv"        "package:stats"     "package:graphics" 
[4] "package:grDevices" "package:utils"     "package:datasets" 
[7] "package:methods"   "Autoloads"         "package:base"     

例2 :

# R program to list the packages
# attached to R search path
  
# Attaching datasets to path
attach(airquality)
attach(BOD)
  
# Calling search() function
search()

输出

 [1] ".GlobalEnv"        "BOD"               "airquality"       
 [4] "package:stats"     "package:graphics"  "package:grDevices"
 [7] "package:utils"     "package:datasets"  "package:methods"  
[10] "Autoloads"         "package:base"