[R] A question about using getSrcDirectory() with R/Rscript

[Cormac Long]

Dear Uwe,

Thanks for you suggestion. I should have spotted that (not thinking
about the order of commands properly). I still don't know why it failed
to work in RGui for me. It works now. I suspect it must be another
case of PEBCAK (Problem Exists Between Chair And Keyboard).

Best wishes,
Cormac.


2011/8/18 Uwe Ligges <ligges at statistik.tu-dortmund.de>:
> Works for me in R-patched:
>
> I guess your problem is that you have to set the options() before
> source()ing.
>
> Best,
> Uwe Ligges
>
>
>
>
> On 17.08.2011 10:31, Cormac Long wrote:
>>
>> Good morning R-help,
>>
>> I have an idiot question: I would like to use getSrcDirectory()
>> and friends to allow me to identify where an R file has been
>> called from when invoked using Rscript. If I understand the
>> documentation correctly, the following example should work:
>>
>> In file test.R:
>>    options(keep.source=T)
>>    fn<-function(x){x<-x+1}
>>    srcDir<-getSrcDirectory(fn)
>>    print(srcDir)
>>
>> I attempted the following invocations of Rscript:
>>    + Rscript test.R
>>    + Rscript<full_path>/test.R
>>
>> I attempted the following invocations using R:
>>    + source("test.R")
>>    + Manually entering the function
>>
>> In both attempts, the variable srcDir is a zero-length character
>> vector. Digging into the documentation, I notice that getSrcDirectory()
>> looks for a "srcref" attribute in the function body. In neither R
>> nor Rscript is this attribute set when declaring the function.
>>
>> So: what am I missing?
>>
>> Comments:
>>    + I have 'keep.source' option set to TRUE in both R and Rscript
>>      (irritatingly, it's default is TRUE in R and FALSE in Rscript
>>       - why is this?)
>>    + I have tested this with:
>>         o R 2.13.1 on Ubuntu 10.10 (server)
>>         o R 2.13.0 on Windows 7
>>
>> Best wishes,
>> Cormac.
>>
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>