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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