问题描述
我在名为 some_functions.R 的文件中具有函数集合，并保存在 C:\ blah1 \ blah2 \ Rcodes \ some_functions.R 的SVN目录中.我有几个使用此代码文件的Rproject.假设在目录 C:\ blah1 \ blah2 \ Rprojects \ project1 中有一个R项目.我可以使用硬编码路径来引用该文件，并且它可以正常工作.
I have a collection of functions in a file called some_functions.R and saved in a SVN directory in C:\blah1\blah2\Rcodes\some_functions.R . I have several Rprojects which uses this code file. Say a R project is available in the directory C:\blah1\blah2\Rprojects\project1. I can use hard coded path to refer the file and it works.
source("C:/blah1/blah2/Rcodes/some_functions.R")'
但是我想将路径设置为环境变量.
查看如何展开用户和环境变量和在Windows R中设置主目录 a>我在RProfile.site文件中添加以下行
Looking at How to unfold user and environment variable in R language? and setting the home directory in windows R I add the following line in the RProfile.site file
Sys.setenv(R_CODE_PATH = "C:/blah1/blah2/Rcodes")
并在project1.Rnw文件中
and in the project1.Rnw file
source("R_CODE_PATH/some_functions.R")
但是项目文件无法读取some_functions.R文件.我尝试了％R_CODE_PATH％，但没有任何运气.
But the project file can not read the some_functions.R file. I tried with %R_CODE_PATH% without any luck.
不确定我在这里缺少什么.任何帮助深表感谢.
Not sure what I'm missing here. Any help is much appreciated.
推荐答案
您可以使用Sys.getenv()检索环境变量.试试:
You retrieve environment variables using Sys.getenv(). Try:
r_code_path <- Sys.getenv("R_CODE_PATH")
然后，例如:
source(paste(r_code_path, "some_functions.R", sep = "/"))
我将使用.Renviron配置文件来定义环境变量.将其放在R命令Sys.getenv("HOME")返回的任何目录中，并包括如下行:
I would use the .Renviron config file to define environment variables. Put it in whatever directory the R command Sys.getenv("HOME") returns and include lines like this:
R_CODE_PATH=C:/blah1/blah2/Rcodes
这篇关于在Tortoise SVN中设置R环境变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！