On Mon, 7 Dec 2009, Patrick Giraudoux wrote:
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)
That is because the GRASS environment variables have not been set at that
point. Do you need to use GRASS in throw-away (initGRASS) mode, or with an
existing location? If the latter, please use the interface in the regular
way, starting R "within" GRASS. I'll try to reproduce the problem, but it
is not easy to do, I'm afraid.
What is your sessionInfo()? Have you tried the WinGRASS stand-alone (I
haven't trusted either QGIS GRASS used this way or OSGeo4W - I follow the
bug-tracker for OSGEO4W, so stay away)?
Would you mind moving to the proper list - this is a GRASS question much
more than an R one:
http://lists.osgeo.org/mailman/listinfo/grass-stats
Roger
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
--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: roger.biv...@nhh.no
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