如何在R中重置或完全覆盖.libPaths？
如何在R中重置或完全覆盖.libPaths？
提问于 2018-09-14 02:16:26
我想让.libPaths()返回"/home/balter/R" "/home/balter/conda/envs/dada2/lib/R/library"。
这就是我所得到的：
> .libPaths()
[1] "/home/balter/R" "/usr/local/lib/R/site-library" "/usr/lib/R/site-library"
[4] "/usr/lib/R/library"
> .libPaths(new='/home/balter/conda/envs/dada2/lib/R/library')
> .libPaths()
[1] "/home/balter/conda/envs/dada2/lib/R/library" "/usr/local/lib/R/site-library"
[3] "/usr/lib/R/site-library" "/usr/lib/R/library"
> .libPaths(new=c("/home/conda/envs/dada2/lib/R/library", "/home/balter/R"))
> .libPaths()
[1] "/home/balter/R" "/usr/local/lib/R/site-library" "/usr/lib/R/site-library"
[4] "/usr/lib/R/library"
> .libPaths(c("/home/conda/envs/dada2/lib/R/library", "/home/balter/R"))
> .libPaths()
[1] "/home/balter/R" "/usr/local/lib/R/site-library" "/usr/lib/R/site-library"
[4] "/usr/lib/R/library"
> .libPaths(c("/home/conda/envs/dada2/lib/R/library", "/home/balter/R"))
> .libPaths()
[1] "/home/balter/R" "/usr/local/lib/R/site-library" "/usr/lib/R/site-library"
[4] "/usr/lib/R/library"
> .libPaths(new=c("/home/conda/envs/dada2/lib/R/library", "/home/balter/R"))
> .libPaths()
[1] "/home/balter/R" "/usr/local/lib/R/site-library" "/usr/lib/R/site-library"
[4] "/usr/lib/R/library"
> .libPaths(new="home/balter/R")
> .libPaths()
[1] "/usr/local/lib/R/site-library" "/usr/lib/R/site-library" "/usr/lib/R/library"
> .libPaths("home/balter/R")
> .libPaths()
[1] "/usr/local/lib/R/site-library" "/usr/lib/R/site-library" "/usr/lib/R/library" 我似乎不能清理和重置路径。
注意：
这是在本地主机上的WSL Ubuntu18.04中运行的RStudio服务器免费版本。
注二：
@Dason指出了一个打字错误。纠正它我有：
> .libPaths()
[1] "/home/balter/R/x86_64-pc-linux-gnu-library/3.4" "/usr/local/lib/R/site-library"
[3] "/usr/lib/R/site-library" "/usr/lib/R/library"
> .libPaths(c("/home/balter/conda/envs/dada2/lib/R/library", "~/R"))
> .libPaths()
[1] "/home/balter/conda/envs/dada2/lib/R/library" "/home/balter/R"
[3] "/usr/local/lib/R/site-library" "/usr/lib/R/site-library"
[5] "/usr/lib/R/library"
> 有没有一种方法可以完全摆脱默认值，只包含第一个？
回答 1
Stack Overflow用户
发布于 2019-06-04 14:31:45
这是相当旧的，但没有标记答案，所以这是我的输入：
我刚刚通过在项目目录的根目录中定义一个.Renviron来覆盖一些rstudio服务器的默认R_*环境变量，从而解决了这个问题。
# .Renviron example - set exclusive R library
R_LIBS=/path/to/your/envs/R/library/ # Set env's R library location
R_LIBS_USER="" # Unset user's local R library
R_LIBS_SITE="" # Unset default system R libraries
# !EDIT! - Make sure the version of R you set to R_HOME is the one that RStudio-Server
# is running. (I haven't been able to get the server to run Anaconda's version)
# When I changed R_HOME to the version in my conda env and the server was running
# the system R, it broke all of the locally compiled packages.
R_HOME=/path/to/your/envs/R # Reset R's home directory to the one in the env's home如果您不知道，.Renviron是一个在R会话启动时运行的脚本。顾名思义，它专门用于设置环境变量。
您还可以在启动时在.Rprofile脚本中运行R代码。下面的示例脚本将向您的.libPaths添加一个新路径，但不会删除通过搜索R_LIBS*目录找到的库。
# .Rprofile - set .libPaths
assign(".lib.loc", "/path/to/your/envs/R/library/", envir = environment(.libPaths))您可以从项目根目录、用户主目录和R的主目录中级联这些配置文件，它们将按该顺序优先运行(但只会运行每种脚本类型的第一个脚本)。
我认为.Renviron是在.Rprofile (或环境变量稍后处理)之后运行的，因为我使用上面的.Rprofile脚本所做的更改总是被环境变量覆盖。
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原文链接：
https://stackoverflow.com/questions/52319609
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