[R] Genuine relative paths with R
o||v|er_g|v@ud@n @end|ng |rom hotm@||@com
Wed Oct 10 22:13:09 CEST 2018
Thank you, Luke.
Unfortunately I don't use Rscript (it is not allowed to run shell scripts on my professional computer).
De : Tierney, Luke <luke-tierney using uiowa.edu>
Envoy� : mercredi 10 octobre 2018 15:48
� : Olivier GIVAUDAN
Cc : Eik Vettorazzi; r-help using r-project.org
Objet : Re: [R] Genuine relative paths with R
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.
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,
> De : Eik Vettorazzi <E.Vettorazzi using uke.de>
> Envoy??? : lundi 8 octobre 2018 11:30
> ??? : Olivier GIVAUDAN; r-help using r-project.org
> Objet : Re: [R] Genuine relative paths with R
> Dear Olivier,
> you may find the rprojroot package useful, see
> and a discussion
> 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:
>> 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,
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> Eik Vettorazzi
> Department of Medical Biometry and Epidemiology
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Ralph E. Wareham Professor of Mathematical Sciences
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