问题
How can I access the windows registry inside R. For example, I want to access the folder:
[HKEY_LOCAL_MACHINE\SOFTWARE\R-core\R\3.0.2]
and the key called "InstallPath"
to get:
"C:\\Program Files\\R\\R-3.0.2"
Many thanks!
回答1:
You could use readRegistry().
On my machine:
fp <- file.path("SOFTWARE", "R-core", "R", "3.1.0", fsep="\\")
readRegistry(fp, "HLM") ## "HLM" eventually resolves to "HKEY_LOCAL_MACHINE"
# $InstallPath
# [1] "C:\\R\\R-current"
(Also, for future reference, in this case you could probably have found that out with a quick call to apropos("registry") or even apropos("reg").)
回答2:
From your question it is not obvious why you'd need to access the registry. If you just want the home directory of your R installation, you can use R.home(). Alternatively you could use Sys.getenv("R_HOME"). If that doesn't give you what you need (I can't test on Windows right now), maybe one of the other environment variables gives you what you need.
来源：https://stackoverflow.com/questions/23936347/access-windows-registry-inside-r