[R-sig-Geo] spgrass6 and initGRASS

[Patrick Giraudoux]

Have tried the following:

initGRASS("C:\\OSGeo4W\\bin",home="U:\\Documents and 
Settings\\pgiraudo\\",override=T)
initGRASS("C:\\Program Files\\Quantum GIS\\grass",home="U:\\Documents 
and Settings\\pgiraudo",override=T)
initGRASS("C:\\OSGeo4W\\bin",override=T)

with the same results...

 > initGRASS("C:\\OSGeo4W\\bin",home="U:\\Documents and 
Settings\\pgiraudo\\",override=T)
Error in system(paste("g.dirseps.exe -g", 
shQuote(Sys.getenv("WINGISRC"))),  :
  g.dirseps.exe not found
 > initGRASS("C:\\Program Files\\Quantum GIS\\grass",home="U:\\Documents 
and Settings\\pgiraudo",override=T)
Error in Sys.setenv(GISRC = gisrc) : wrong length for argument
 > initGRASS("C:\\OSGeo4W\\bin",override=T)
Error in Sys.setenv(GISRC = gisrc) : wrong length for argument

Quite puzzling since g.dirseps does not give a message "unknown command" 
when tried within grass (thus it is suppose to be in the GRASS programme)

Patrick



Roger Bivand a écrit :
> On Mon, 7 Dec 2009, Patrick Giraudoux wrote:
>
>> Here is the result:
>>
>> library(spgrass6)
>>
>> debug(initGRASS)
>>> initGRASS("C:/OSGeo4W/bin",home="U:/Documents and 
>> Settings/pgiraudo/",override=T)
>>
>> (...)
>>
>> Browse[2]>
>> debug: gisrc <- system(paste("g.dirseps.exe -g", 
>> shQuote(Sys.getenv("WINGISRC"))),
>>   intern = TRUE)
>> Browse[2]> Sys.getenv("WINGISRC")
>>                                       WINGISRC
>> "U:/Documents and Settings/pgiraudo/\\.grassrc6"
>> Browse[2]> shQuote(Sys.getenv("WINGISRC"))
>> [1] "\"U:/Documents and Settings/pgiraudo/\\.grassrc6\""
>> Browse[2]> gisrc
>> Error: object 'gisrc' not found
>
> Could you try both not setting home= (you get a temporary folder that 
> is deleted when you exit R), or setting
>
> home="U:\\Documents and Settings\\pgiraudo"
>
> without the trailing forward slash?
>
> This a problem connected to protecting spaces on the one hand and 
> system specific directory separators on the other, I think.
>
> Roger
>
>>
>> Beforehand, the first time I run 
>> initGRASS("C:/OSGeo4W/bin",home="U:/Documents and 
>> Settings/pgiraudo/",override=T), I got:
>>
>> initGRASS("C:/OSGeo4W/bin",home="U:/Documents and 
>> Settings/pgiraudo/",override=T)
>> Error in system(paste("g.dirseps.exe -g", 
>> shQuote(Sys.getenv("WINGISRC"))), :
>> g.dirseps.exe not found
>>
>> Then, if I try the same commande on QGIS Metis, I got:
>> initGRASS("C:/Program Files/Quantum GIS/grass",home="U:/Documents and 
>> Settings/pgiraudo",override=T)
>> Error in Sys.setenv(GISRC = gisrc) : wrong length for argument
>>
>>
>> Best,
>>
>> Patrick
>>
>>
>>
>>
>>
>>
>>
>> Roger Bivand a écrit :
>>> On Sun, 6 Dec 2009, Patrick Giraudoux wrote:
>>>
>>>> Dear all,
>>>>
>>>> I am trying to init a GRASS session from within R, using the 
>>>> function initGRASS from the package spgrass6. GRASS is installed in 
>>>> two ways on my computer (here, the OS is Windows XP): with QGIS 
>>>> metis (precompiled version including grass 6.3 (2008)) and grass 
>>>> 6.4.0svn, just freshly installed with the Osgeo4W installer.
>>>>
>>>> In both cases I get the same result:
>>>>
>>>>> initGRASS("C:/Program Files/Quantum GIS/grass",home="U:/Documents and 
>>>> Settings/pgiraudo",override=T)
>>>> Error in Sys.setenv(GISRC = gisrc) : wrong length for argument
>>>>
>>>>> initGRASS("C:/OSGeo4W/bin",home="U:/Documents and 
>>>> Settings/pgiraudo",override=T)
>>>> Error in Sys.setenv(GISRC = gisrc) : wrong length for argument
>>>>
>>>> Any idea about what happens ?
>>>
>>> No, without the output of traceback(), it isn't obvious, although 
>>> here traceback() might not help. Run under debug(initGRASS) to the 
>>> step before, that is:
>>>
>>>         gisrc <- system(paste("g.dirseps.exe -g",
>>>             shQuote(Sys.getenv("WINGISRC"))), intern=TRUE)
>>>
>>> then run:
>>>
>>> Sys.getenv("WINGISRC")
>>> shQuote(Sys.getenv("WINGISRC"))
>>> gisrc
>>>
>>> and try to see what is going on. At this stage, Sys.getenv("GISRC") 
>>> should be "junk", assigned a couple of lines earlier.
>>>
>>> Maybe the grass-stats list would have a higher proportion of users 
>>> of both GRASS and R.
>>>
>>> Hope this helps,
>>>
>>> Roger
>>>
>>>>
>>>> Patrick
>>>>
>>>
>>
>>
>