[GRASS-user] Rscript error when using v.class.mlR

[Jamille Haarloo]

Thank you Helmut,
R is not found:
'R' is not recognized as an internal or external command, operable program
or batch file.
Currently looking for information online about what to do.

I also installed the winGRASS 8.3 via/in OSGeo4W v2, but now there is also
a problem with g.extension to add v.class.mlR. I tried it on my laptop and
work computer. Same problem.
--------

Exception in thread
Thread-14
:
Traceback (most recent call last):
  File "C:\OSGeo4W\apps\Python39\lib\threading.py", line
954, in _bootstrap_inner

self.run()
  File "C:\OSGeo4W\apps\grass\grass83\gui\wxpython\core\gthr
ead.py", line 154, in __run

self.__run_backup()
  File "C:\OSGeo4W\apps\grass\grass83\gui\wxpython\core\gthr
ead.py", line 117, in run

ret = vars()["callable"](*args, **kwds)
  File "C:\OSGeo4W\apps\grass\grass83\gui\wxpython\modules\e
xtensions.py", line 369, in Load

raise GException(_("Unable to load extensions. %s") % msg)
core.gcmd
.
GException
:
Unable to load extensions. Traceback (most recent call
last):
File "C:\OSGeo4W\apps\grass\grass83\scripts\g.extension.py",
line 2855, in <module>
sys.exit(main())
File "C:\OSGeo4W\apps\grass\grass83\scripts\g.extension.py",
line 2803, in main
xmlurl = resolve_xmlurl_prefix(original_url, source=source)
File "C:\OSGeo4W\apps\grass\grass83\scripts\g.extension.py",
line 2492, in resolve_xmlurl_prefix
version_branch = get_version_branch(VERSION[0])
File "C:\OSGeo4W\apps\grass\grass83\scripts\g.extension.py",
line 507, in get_version_branch
branch = gs.Popen(
File "C:\OSGeo4W\apps\grass\grass83\etc\python\grass\script\
core.py", line 55, in __init__
raise OSError(_("Cannot find the executable
{0}").format(args[0]))
OSError: Cannot find the executable git



On Wed, Jul 19, 2023 at 3:02 PM Helmut Kudrnovsky <hellik at web.de> wrote:

> >I am using standalone winGRASS, but installed it with OSGeo4W because I
> also use QGIS.
>
> I don't understand this. How do you install standalone winGRASS with
> OSGeo4W? But that's another question.
>
> Jürgen re-packaged now winGRASS 8.3.0 in OSGeo4W version 2 including the
> Rbatch-files.
>
> have a look at
> https://github.com/ggrothendieck/batchfiles/blob/master/R.bat#L520 and
> following code lines.
>
> the relevant one is
> https://github.com/ggrothendieck/batchfiles/blob/master/R.bat#L532
>
> "echo   path - Add R_TOOLS, R_MIKTEX ^& R_PATH to path for this cmd line
> session (0)"
>
> just tried here in OSGeo4W version 2 with re-packaged winGRASS 8.3.0:
>
> * starting a GRASS session
> * typing into the windows console: R path => this adds temporarily the
> path to R to %PATH%
> * typing into the windows console: RScript -e "sessionInfo()" => outputs
> all necessary infos if R is correctly found (as Micha suggested)
>
> when temporarily the path to R is added to %PATH% within the winGRASS
> session, try v.class.mlR.
>
>
> Kind regards
> Helmut
>
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