On Jun 4, 2015, at 8:47 AM, Wall, Wade A ERDC-RDE-CERL-IL
<wade.a.w...@usace.army.mil> wrote:
>
> Hi all,
>
> I am trying to pass arguments to a python script using R, but am running into
> a problem with the string being split on the white spaces. Investigation on
> the python end suggests that it is happening upstream from python, because
> other shells such as bash have generated similar errors.
>
> Here is example code.
>
> R script:
>
> test = "./Example.py"
> string1 = "ThisWorks"
> string2 = "This doesn't"
>
> system2('python',args = c(as.character(test),as.character(string1))) ## This
> works
> system2('python',args = c(as.character(test),as.character(string2))) ## This
> doesn't
>
> Python script:
>
> from sys import argv
> script, string = argv
> print script
> print string
>
> What happens is that string 2 is splits into "This" and "doesn't". Does
> anyone know how to resolve this issue? Of course I can remove the white
> spaces, but that may be somewhat inconvenient.
>
> Thanks for any help.
>
>
> Wade
See ?shQuote
> shQuote(string2)
[1] “\"This doesn’t\""
Regards,
Marc Schwartz
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