[R] R not recognized in command line

Joshua Wiley jwiley.psych at gmail.com
Wed Jan 5 16:59:26 CET 2011

On Wed, Jan 5, 2011 at 7:41 AM, Duncan Murdoch <murdoch.duncan at gmail.com> wrote:
> Editing the PATH is probably the best approach, but a lot of people get it
> wrong because of misunderstanding how it works:
>  -  If you change PATH in one process the changes won't propagate anywhere
> else, and will be lost as soon as you close that process.  That could be a
> cmd window, or an R session, or just about any other process that lets you
> change environment variables.
>  -  If you want to make global changes to the PATH, you need to do it in the
> control panel "System|Advanced|Environment variables" entries.

Note it is also possible to make global changes using the powershell
by setting the user to "Machine".

[Environment]::SetEnvironmentVariable("TestVariable", "Test value.", "Machine")


>  - Often it is good enough to use a more Unix-like approach, and only make
> the change at startup of the cmd processor.  You use the /k option when
> starting cmd if you want to run something on startup.
> Duncan Murdoch

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