[R] where does R search when source()?

[Roger D. Peng]

In fact, there is an elegant solution, and that is to write a 
package.  If this is all for personal use, then writing a package 
can be as simple as creating a few directories, copying the 
script files, and then running R CMD INSTALL.  I do this all the 
time when I have multiple projects that use the same code.

-roger

Shin, Daehyok wrote:
> To my knowledge, it is a common practice for users to archive some script
> files in other directories than current working directory, when the script
> files are frequently used in many cases. So, it is somewhat surprising to me
> there is no elegant solution to set up default search paths in R.
> 
> Here is my suggestion.
> According to the setup of Python (http://docs.python.org/tut/node8.html),
> when source() is called,
> 
> 1. Search current working directory.
> 2. If not found, search the directories specified by the environment
> variable RPATH.
> 
> I think this change will help users to manage script files more easily. What
> do you think of it?
> 
> Daehyok Shin
> 
> 
>>-----Original Message-----
>>From: Liaw, Andy [mailto:andy_liaw at merck.com]
>>Sent: Saturday, July 10, 2004 PM 10:07
>>To: 'sdhyok at email.unc.edu'; R, Help
>>Subject: RE: [R] where does R search when source()?
>>
>>
>>Not really.  The best I can come up with is something like:
>>
>>runScript <- function(script, dir="", ...) source(file.path(dir, script,
>>...)
>>scriptdir <- "/path/to/scripts"
>>
>>runScript(scriptdir, "myScript.R")
>>
>>Andy
>>
>>
>>>From: Shin, Daehyok
>>>
>>>The reason I asked is to separate script files from data files.
>>>Usually, I am working in the directory containing data files, but some
>>>script files are in other shared directories. In the case, is
>>>there any way
>>>to access the script files conveniently without specifying
>>>its absolute
>>>path? In other word, any way to set up default search paths for script
>>>files?
>>>
>>>Daehyok Shin (Peter)
>>>
>>>
>>>>The former.  No documentation says otherwise, so why would you
>>>>think that it
>>>>might search somewhere else?
>>>>
>>>>Andy
>>>>
>>>>
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