June 2020
Beginner to intermediate
522 pages
9h 6m
Chinese
Content preview from R 语言经典实例（原书第 2 版）
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R
入门和获得帮助
｜
17
1.5.2.2 macOS
在主菜单中选择“文件”（File）→“退出”（Quit），或按下 Cmd+Q，或点击窗口左上方
的红色圆圈。
在所有操作系统中都可以使用 q 函数（q 代表
q
uit）来结束 R 程序和 RStudio：
q()
注意，函数中必须包含一对空的圆括号。
1.5.3 讨论
退出时，R 会提示你是否保存当前工作空间，你有三种选择：
•
保存工作空间并退出。
•
不保存，但退出。
•
取消保存，并返回到命令提示符。
选择保存后，R 会在你的当前工作目录中生成一个后缀为
.RData
的文件。保存工作空间
会保存你创建的所有 R 对象。下次在同一目录中启动 R 时，工作空间将自动加载。若当
前工作空间中已存在同名文件，保存工作空间将会覆盖原有文件，因此在保存时需留心
以免覆盖重要数据。
我们建议你在退出时不要保存工作空间，而是始终明确保存项目、脚本和数据。我们还
建议你使用 R 用户界面的菜单中的全局（global）选项关闭 R 退出时的保存提示 , 选择
如下：工具（Tools）→全局选项（
Global Options
），如图 1-3 所示。这样的话，当你退
出 R 和 RStudio 时，系统不会弹出窗口来提示你保存工作空间。但请记住，已经创建但
尚未保存的任何对象都将丢失！
1.5.4 另请参阅
更多有关当前工作目录的细节，请参见 3.1 节；关于如何保存工作空间，请参见 3.3 节；
也可以参见
R in a Nutshell
一书中第 2 章的内容。
1.6 中断 R 正在运行的程序 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.