blocks|key|521587|text|您应该会看到一个带有存储库列表的窗口，或者一个带有一些选项的文本菜单。但是如果没有显示，您可以使用repos参数指定您自己下载包的镜像。这样一来，R就不会再问你关于存储库的问题了。示例：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|521588|install.packages('RMySQL',+repos='http://cran.us.r-project.org')|code-block|syntax|javascript|521589|这里有一个R的list+of+mirrors。|521590|entityMap|0|LINK|mutability|MUTABLE|url|http://cran.r-project.org/mirrors.html^0|1D|5|0|0|7|F|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

You should either get a window with a list of repositories or a text menu with some options. But if that is not appearing, you can always specify the mirror from where to download the packages yourself by using <code>repos</code> parameter. By doing that, R will not ask you anymore about the repository. Example:

<pre><code>install.packages('RMySQL', repos='http://cran.us.r-project.org')
</code></pre>

Here you have a <a href="http://cran.r-project.org/mirrors.html">list of mirrors</a> for R.

blocks|key|304926|text|我是一个粉丝：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|304927|chooseCRANmirror()|code-block|syntax|javascript|304928|它将在输出中打印镜像列表(不用担心会出现弹出窗口，因为您是从终端运行它)，然后您可以输入您想要的数字。|304929|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I'm a fan of:

<pre><code>chooseCRANmirror()
</code></pre>

Which will print the list of mirrors in the output (no worrying a popup window since you are running it from the terminal) and then you enter the number you want.

blocks|key|305070|text|我使用了Dirk推荐的~/.Rprofile解决方案，但我只是想指出|type|unstyled|depth|inlineStyleRanges|entityRanges|data|305071|chooseCRANmirror(graphics=FALSE)|code-block|syntax|javascript|305072|似乎是明智的做法，而不是|305073|chooseCRANmirror(81)|305074|，这可能行得通，但它涉及到神奇的数字81+(或者这可能是一种微妙的方式，将旅游业推广到81+=+UK+(布里斯托尔)+:-)|305075|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I use the ~/.Rprofile solution suggested by Dirk, but I just wanted to point out that 

<pre><code>chooseCRANmirror(graphics=FALSE)
</code></pre>

seems to be the sensible thing to do instead of

<pre><code>chooseCRANmirror(81)
</code></pre>

, which may work, but which involves the magic number 81 (or maybe this is subtle way to promote tourism to 81 = UK (Bristol) :-) )

blocks|key|304968|text|存储库选择屏幕无法显示在您的系统(OS+X)上，因为OS+X不再包含X11。R尝试通过X11显示提示符。从http://xquartz.macosforge.org/landing/安装X11。然后运行install命令。将显示回购选择提示。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|304969|entityMap|0|LINK|mutability|MUTABLE|url|http://xquartz.macosforge.org/landing/^0|1H|12|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Repository selection screen cannot be shown on your system (OS X), since OS X no longer includes X11. R tries to show you the prompt through X11. Install X11 from <a href="http://xquartz.macosforge.org/landing/">http://xquartz.macosforge.org/landing/</a>. Then run the install command. The repo selection prompt will be shown.

blocks|key|305001|text|我用过|type|unstyled|depth|inlineStyleRanges|entityRanges|data|305002|chooseCRANmirror(81)|code-block|syntax|javascript|305003|它会提示您选择国家/地区。然后，您可以通过键入此处指定的国家/地区镜像代码进行选择。|305004|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I used

<pre><code>chooseCRANmirror(81)
</code></pre>

it gives you a prompt to select the country. 
Then you can do a selection by typing the country mirror code specified there.

blocks|key|305126|text|如果您需要以非交互方式设置镜像(例如，在部署脚本中执行rbundler安装)，您可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|305127|第一次手动运行：|305128|chooseCRANmirror()|code-block|syntax|javascript|305129|选择最适合你的镜像编号并记住它。然后，要自动选择：|305130|R+-e+'chooseCRANmirror(graphics=FALSE,+ind=87);library(rbundler);bundle()'|305131|其中87是您要使用的镜像的编号。此代码段还会为您安装rbundle。如果你愿意，你可以省略它。|305132|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

If you need to set the mirror in a non-interactive way (for example doing an rbundler install in a deploy script) you can do it in this way:

First manually run:

<pre><code>chooseCRANmirror()
</code></pre>

Pick the mirror number that is best for you and remember it. Then to automate the selection:

<pre><code>R -e 'chooseCRANmirror(graphics=FALSE, ind=87);library(rbundler);bundle()'
</code></pre>

Where 87 is the number of the mirror you would like to use. This snippet also installs the rbundle for you. You can omit that if you like.

blocks|key|305330|text|无论您是在终端中使用R还是在RStudio等集成开发环境中使用R，都应该弹出一个下拉菜单供您选择(否则您将获得一堆可供选择的数字)。这在Windows、Mac+OS和大多数Linux系统上都受支持。但是，它可能需要其他配置或依赖项，如X-windows。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|305331|要在使用远程访问时启用X-windows，请使用以下-XY标记：|offset|length|style|CODE|305332|ssh+-XY+username@server.domain|code-block|syntax|javascript|305333|通常会有一个默认的repo，但是如果您有任何问题，比如运行脚本或Rmarkdown/knitr，可以指定默认repo。您可以在每次安装时使用repo选项设置CRAN的镜像或存储库：|305334|install.packages("package",+repo="<your.nearest.mirror>")|305335|建议使用离您位置最近的镜像，以便更快地下载。例如：|305336|install.packages("RMySQL",+repos="https://cran.stat.auckland.ac.nz/")|305337|您还可以在会话中设置repos选项，以便在每个交互式会话(或脚本)中只需要设置一次。您可以检查repos是否配置了：|305338|options(repos)|305339|如果您获得"Error+in+options(repos)+:+object+'repos'+not+found"，那么您可以设置存储库选项。例如：|305340|options(repos+=+"https://cran.stat.auckland.ac.nz/")|305341|然后，它应该像往常一样安装软件包。例如：|305342|install.packages("RMySQL")|305343|正如其他人所提到的，您可以在.Rprofile文件中配置存储库，并在所有脚本中执行此操作。您可以在系统上选择这些“全局”选项，还是在会话或脚本中选择“本地”选项。这些“本地”选项需要花费更多的时间来使用每个会话，但好处是如果其他人没有您的.Rprofile，他们就可以使用您的脚本。|305344|entityMap^0|0|Q|3|0|0|1Y|4|0|0|0|0|A|5|1B|5|0|0|5|1G|0|0|0|0|E|9|3B|9|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@$D|1C|E|1D|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|1E|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1F|8|@$D|1G|E|1H|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|1I|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|1J|8|@]|9|@]|A|$]]|$1|S|3|T|5|J|7|1K|8|@]|9|@]|A|$K|L]]|$1|U|3|V|5|6|7|1L|8|@$D|1M|E|1N|F|G]|$D|1O|E|1P|F|G]]|9|@]|A|$]]|$1|W|3|X|5|J|7|1Q|8|@]|9|@]|A|$K|L]]|$1|Y|3|Z|5|6|7|1R|8|@$D|1S|E|1T|F|G]]|9|@]|A|$]]|$1|10|3|11|5|J|7|1U|8|@]|9|@]|A|$K|L]]|$1|12|3|13|5|6|7|1V|8|@]|9|@]|A|$]]|$1|14|3|15|5|J|7|1W|8|@]|9|@]|A|$K|L]]|$1|16|3|17|5|6|7|1X|8|@$D|1Y|E|1Z|F|G]|$D|20|E|21|F|G]]|9|@]|A|$]]|$1|18|3|-4|5|6|7|22|8|@]|9|@]|A|$]]]|19|$]]

A drop down menu should pop up for you to select from (or you will get a bunch of numbers to choose from), whether you are using R in the terminal or an IDE such as RStudio. This is supported on Windows, Mac OS, and most Linux systems. However, it may require additional configuration or dependencies such as X-windows.

To enable X-windows when using remote access use the following <code>-XY</code> flags:

<pre><code>ssh -XY username@server.domain
</code></pre>

There is often a default repo but this can be specified if you have any issue, such as running scripts or Rmarkdown/knitr. You can use the <code>repo</code> opset the mirror or repository for CRAN each time you install with:

<pre><code>install.packages("package", repo="&lt;your.nearest.mirror&gt;")
</code></pre>

It is advisable to use the nearest mirror to your location for faster downloads. For example:

<pre><code>install.packages("RMySQL", repos="https://cran.stat.auckland.ac.nz/")
</code></pre>

You can also set the <code>repos</code> option in your session so you only need to it once per interactive session (or script). You can check whether <code>repos</code> is configured with:

<pre><code>options(repos)
</code></pre>

If you get <code>"Error in options(repos) : object 'repos' not found"</code> then you can set the repository option. For example:

<pre><code>options(repos = "https://cran.stat.auckland.ac.nz/")
</code></pre>

Then it should work to install packages like usual. For Example:

<pre><code>install.packages("RMySQL")
</code></pre>

As mentioned by others, you can configure the repository in your <code>.Rprofile</code> file and have this work across all of your scripts. It's up to you whether your prefer these "global" options on your system or "local" options in your session or script. These "local" options take more time to use each session but have the benefit of making others able to use your scripts if they don't have your <code>.Rprofile</code>.

blocks|key|521966|text|您也可以通过运行此程序或将其放置在Rprofile中来禁用所有图形菜单|type|unstyled|depth|inlineStyleRanges|entityRanges|data|521967|options(menu.graphics+=+FALSE)|code-block|syntax|javascript|521968|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You could also disable all graphical menus by running this or placing it in your Rprofile

<pre><code>options(menu.graphics = FALSE)
</code></pre>

blocks|key|305184|text|在macOS上，我看到的就是你所说的：“请选择”提示符，然后就什么都没有了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|305185|在我打开(并更新；不知道这是否相关)+X-Quartz之后，然后重启R并重试，几秒钟后我得到了一个可供选择的X-window镜像列表。第三次以后的速度更快。|305186|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I had, on macOS, the exact thing that you say: A 'please select' prompt and then nothing more.

After I opened (and updated; don't know if that was relevant) X-Quartz, and then restarted R and tried again, I got an X-window list of mirrors to choose from after a few seconds. It was faster the third time onwards.

blocks|key|305401|text|添加到~/.Rprofile中|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|305402|local({r+<-+getOption("repos")
++++r["CRAN"]+<-+"mirror_site"++#for+example,+https://mirrors.ustc.edu.cn/CRAN/
++++options(repos=r)
++++options(BioC_mirror="bioc_mirror_site")+#if+using+biocLite
})|code-block|syntax|javascript|305403|entityMap^0|3|B|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Add into <code>~/.Rprofile</code>

<pre><code>local({r &lt;- getOption("repos")
 r["CRAN"] &lt;- "mirror_site" #for example, https://mirrors.ustc.edu.cn/CRAN/
 options(repos=r)
 options(BioC_mirror="bioc_mirror_site") #if using biocLite
})
</code></pre>

I'm trying to install a package through the R prompt by doing the following:

<pre><code>install.packages('RMySQL')
</code></pre>

But the output is as follows: 

<pre><code>--- Please select a CRAN mirror for use in this session ---
</code></pre>

And nothing else! I can't find a solution to this very basic problem. What am I supposed to type in order to select a CRAN mirror? 

EDIT: 

OS: Mac-OS X 10.6.8
R Version: 2.15.0

How to select a CRAN mirror in R

我尝试通过R提示符来安装一个包，方法是执行以下操作：install.packages('RMySQL')但输出如下：--- Please select a CRAN mirror for use in this session ---没别的了！对于这个非常基本的问题，我找不到解决方案。为了选择一个CRAN镜像，我应该输入什么？编辑：操作系统: Mac-OS X 10.6.8 R版本: 2.15.0

问如何在R中选择CRAN镜像
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