r - 卸载所有加载的包

Question

我看过这个，但无法轻易找到如何去做。我试图编写一些因错误而失败的函数:

Error in unloadNamespace(x) : namespace ‘graphics’ is imported by ‘stats and other packages here'

但是，其中许多包甚至不在 search 列表中。

[1] ".GlobalEnv"        "tools:rstudio"     "package:grDevices" "package:utils"     "package:datasets" 
[6] "package:methods"   "Autoloads"         "package:base"

这是我正在玩的功能:

lapply(gsub("package:","",search()[grep(".*(?<=package:)",search(),perl = T)]),
       function(x) unloadNamespace(x))

一个不起作用的变体:

lapply(gsub("package:","",search()[grep(".*(?<=package:)",search(),perl = T)]),
       function(x) detach(x))

问题 :
我怎样才能最好地卸载几个包(如果我能全部卸载它们就更好了)？

Answer 1

我通常运行这样的东西来卸载所有非基础包:

detachAllPackages <- function() {
  basic.packages.blank <- c(    
    "stats",    
    "graphics",    
    "grDevices",    
    "utils",   
    "datasets",  
    "methods",    
    "base"    
  )    
  basic.packages <- paste("package:", basic.packages.blank, sep = "")   
  package.list <- search()[ifelse(unlist(gregexpr("package:", search())) == 1, TRUE, FALSE)]   
  package.list <- setdiff(package.list, basic.packages)   
  if (length(package.list) > 0) {   
    for (package in package.list) {   
      detach(package, character.only = TRUE)   
    }   
  }    
}

detachAllPackages()