blocks|key|1445880|text|您可以直接从存储库安装(请注意type="source")：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1445881|install.packages("RJSONIO",+repos+=+"http://www.omegahat.org/R",+type="source")|code-block|syntax|javascript|1445882|entityMap^0|F|D|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|$]]

You can install directly from the repository (note the <code>type="source"</code>):

<pre><code>install.packages("RJSONIO", repos = "http://www.omegahat.org/R", type="source")
</code></pre>

blocks|key|1230924|text|下载源包，打开Terminal.app，导航到当前文件所在的目录，然后执行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1230925|R+CMD+INSTALL+RJSONIO_0.2-3.tar.gz|code-block|syntax|javascript|1230926|请注意，只有在以下情况下才会成功:+a)包不需要编译，或者b)存在编译所需的系统工具。请参阅：https://cran.r-project.org/bin/macosx/tools/|offset|length|1230927|entityMap|0|LINK|mutability|MUTABLE|url|https://cran.r-project.org/bin/macosx/tools/^0|0|0|1B|18|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Download the source package, open Terminal.app, navigate to the directory where you currently have the file, and then execute:

<pre><code>R CMD INSTALL RJSONIO_0.2-3.tar.gz
</code></pre>

Do note that this will only succeed when either: a) the package does not need compilation or b) the needed system tools for compilation are present. See: <a href="https://cran.r-project.org/bin/macosx/tools/" rel="noreferrer">https://cran.r-project.org/bin/macosx/tools/</a>

blocks|key|1231011|text|此外，您可以使用--binary选项构建二进制包。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1231012|R+CMD+build+--binary+RJSONIO_0.2-3.tar.gz|code-block|syntax|javascript|1231013|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|$]]

In addition, you can build the binary package using the --binary option.

<pre><code>R CMD build --binary RJSONIO_0.2-3.tar.gz
</code></pre>

blocks|key|1231077|text|从源代码安装较旧版本的软件包的补充方便(但琐碎)技巧。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1231078|首先，如果你调用"install.packages"，它总是从repo安装最新的包。如果你想安装老版本的包，比如说为了兼容，你可以调用install.packages("url_to_source"，repo=NULL，type=“type=”)。例如：|1231079|install.packages("http://cran.r-project.org/src/contrib/Archive/RNetLogo/RNetLogo_0.9-6.tar.gz",+repo=NULL,+type="source")|code-block|syntax|javascript|1231080|无需手动将软件包下载到本地磁盘，并切换到命令行或从本地磁盘安装，我发现它非常方便，并简化了调用(一步)。|1231081|另外:你可以在devtools库的dev_mode中使用这个技巧，以便管理不同版本的包：|1231082|参考：doc+devtools|offset|length|1231083|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/hadley/devtools^0|0|0|0|0|0|3|C|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

A supplementarily handy (but trivial) tip for installing older version of packages from source.

First, if you call "install.packages", it always installs the latest package from repo. If you want to install the older version of packages, say for compatibility, you can call install.packages("url_to_source", repo=NULL, type="source"). For example:

<pre><code>install.packages("http://cran.r-project.org/src/contrib/Archive/RNetLogo/RNetLogo_0.9-6.tar.gz", repo=NULL, type="source")
</code></pre>

Without manually downloading packages to the local disk and switching to the command line or installing from local disk, I found it is very convenient and simplify the call (one-step). 

Plus: you can use this trick with devtools library's dev_mode, in order to manage different versions of packages:

Reference: <a href="https://github.com/hadley/devtools">doc devtools</a>

blocks|key|1231119|text|From+cran，您可以直接从github存储库地址安装。所以如果你想在https://github.com/twitter/AnomalyDetection上下载这个包|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1231120|library(devtools)
install_github("twitter/AnomalyDetection")|code-block|syntax|javascript|1231121|真的很管用。|1231122|entityMap|0|LINK|mutability|MUTABLE|url|https://cran.r-project.org/web/packages/githubinstall/vignettes/githubinstall.html^0|11|17|0|9|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|H|7|10|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|11|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

<a href="https://cran.r-project.org/web/packages/githubinstall/vignettes/githubinstall.html" rel="noreferrer">From cran</a>, you can install directly from a github repository address. So if you want the package at <code>https://github.com/twitter/AnomalyDetection</code>:

<pre><code>library(devtools)
install_github("twitter/AnomalyDetection")
</code></pre>

does the trick.

A friend sent me along this great tutorial on <a href="http://www.stanford.edu/~cengel/cgi-bin/anthrospace/scraping-new-york-times-articles-with-r" rel="noreferrer">webscraping NYtimes with R</a>. I would really love to try it. However, the first step is to installed a package called RJSONIO from source.

I know R reasonably well, but I have no idea how to install a package from source.

I'm running Mac OSX.

How do I install an R package from source?

一位朋友在上给我发来了这个很棒的教程。我真的很想试试。但是，第一步是从源代码安装一个名为RJSONIO的包。我对R相当了解，但是我不知道如何从源代码安装一个包。我在运行Mac OSX。

问如何从源安装R包？
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