If you are always running your main script as 'Rscript myscript.R'
then your file argument will appear as '--file=myscript.R' in
commandArgs(). So you can use something like
scriptFile <- function()
{
pat <- "^--file="
args <- commandArgs()
file <- args[grepl(pat, args, args)]
normalizePath(sub(pat, "", file))
}
Then scriptFile() will give you something to work with.
Best,
luke
On Wed, 10 Oct 2018, Olivier GIVAUDAN wrote:
> Dear Eik,
>
> Thank you for your message.
>
> Yes, I already got to know this package and this discussion (while I found
> the 'here' package). But thanks.
>
> Best regards,
>
> Olivier
> ________________________________
> De : Eik Vettorazzi <e.vettora...@uke.de>
> Envoy??? : lundi 8 octobre 2018 11:30
> ??? : Olivier GIVAUDAN; r-help@r-project.org
> Objet : Re: [R] Genuine relative paths with R
>
> Dear Olivier,
> you may find the rprojroot package useful, see
> https://github.com/r-lib/rprojroot
>
> and a discussion
>
> https://gist.github.com/jennybc/362f52446fe1ebc4c49f#file-2014-10-12_stop-working-directory-insanity-md
>
> Cheers
>
> Am 06.10.2018 um 13:48 schrieb Olivier GIVAUDAN:
>> Dear R users,
>>
>> I would like to work with genuine relative paths in R for obvious reasons:
>> if I move all my scripts related to some project as a whole to another
>> location of my computer or someone else's computer, if want my scripts to
>> continue to run seamlessly.
>>
>> What I mean by "genuine" is that it should not be necessary to hardcode one
>> single absolute path (making the code obviously not "portable" - to another
>> place - anymore).
>>
>> For the time being, I found the following related posts, unfortunately never
>> conclusive or even somewhat off-topic:
>> https://stackoverflow.com/questions/1815606/rscript-determine-path-of-the-executing-script
>> https://stackoverflow.com/questions/47044068/get-the-path-of-current-script/47045368
>> http://r.789695.n4.nabble.com/Script-auto-detecting-its-own-path-td2719676.html
>>
>> So I found 2 workarounds, more or less satisfactory:
>>
>>
>> 1. Either create a variable "ScriptPath" in the first lines of each of
>> my R scripts and run a batch (or shell, etc.) to replace every single
>> occurrence of "ScriptPath <-" by "ScriptPath <- [Absolute path of the R
>> script]" in all the R scripts located in the folder (and possibly
>> subfolders) of the batch file.
>> 2. Or create an R project file with RStudio and use the package "here"
>> to get the absolute path of the R project file and put all the R scripts
>> related to this project in the R project directory, as often recommended.
>>
>> But I am really wondering why R doesn't have (please tell me if I'm wrong)
>> this basic feature as many other languages have it (batch, shell, C, LaTeX,
>> SAS with macro-variables, etc.)?
>> Do you know whether the language will have this kind of function in a near
>> future? What are the obstacles / what is the reasoning for not having it
>> already?
>>
>> Do you know other workarounds?
>>
>> Best regards,
>>
>> Olivier
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> --
> Eik Vettorazzi
>
> Department of Medical Biometry and Epidemiology
> University Medical Center Hamburg-Eppendorf
>
> Martinistrasse 52
> building W 34
> 20246 Hamburg
>
> Phone: +49 (0) 40 7410 - 58243
> Fax: +49 (0) 40 7410 - 57790
> Web: www.uke.de/imbe<http://www.uke.de/imbe>
> --
>
> _____________________________________________________________________
>
> Universit???tsklinikum Hamburg-Eppendorf; K???rperschaft des ???ffentlichen
> Rechts; Gerichtsstand: Hamburg | www.uke.de
> Vorstandsmitglieder: Prof. Dr. Burkhard G???ke (Vorsitzender), Prof. Dr. Dr.
> Uwe Koch-Gromus, Joachim Pr???l???, Martina Saurin (komm.)
> _____________________________________________________________________
>
> SAVE PAPER - THINK BEFORE PRINTING
>
> [[alternative HTML version deleted]]
>
>
--
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
Actuarial Science
241 Schaeffer Hall email: luke-tier...@uiowa.edu
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
