如何从 R 中的工作区中删除除一个以外的所有对象? [英] How can I remove all objects but one from the workspace in R?

问题描述

我有一个包含很多对象的工作区，我想删除除一个之外的所有对象.理想情况下，我想避免输入 rm(obj.1, obj.2... obj.n).是否可以指示删除除这些之外的所有对象?

I have a workspace with lots of objects and I would like to remove all but one. Ideally I would like to avoid having to type rm(obj.1, obj.2... obj.n). Is it possible to indicate remove all objects but these ones?

推荐答案

这是一个简单的结构，可以使用 setdiff:

Here is a simple construct that will do it, by using setdiff:

rm(list=setdiff(ls(), "x"))

还有一个完整的例子.运行此操作需您自担风险 - 它将删除除 x 之外的所有变量:

And a full example. Run this at your own risk - it will remove all variables except x:

x <- 1
y <- 2
z <- 3
ls()
[1] "x" "y" "z"

rm(list=setdiff(ls(), "x"))

ls()
[1] "x"

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