I've got the solution: I had to put the correct directories in the path Also, the commands that use the "system" need to use the execGRASS function. Thanks, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodge...@uhd.edu
________________________________ From: Roger Bivand [mailto:roger.biv...@nhh.no] Sent: Mon 1/10/2011 3:18 AM To: Hodgess, Erin Cc: r-sig-geo@r-project.org Subject: Re: [R-sig-Geo] newbie question about R and GRASS On Sun, 9 Jan 2011, Hodgess, Erin wrote: > Dear R SIG Geo People: > > I'm trying to replicate the material on page 100 in Prof. Bivand ASDAR > book. However, I am getting the following error message: > > >> gmeta6() > Error in if (file.exists(file) == FALSE) if (!missing(asText) && asText == : > argument is of length zero > In addition: Warning message: > running command 'g.region.exe --interface-description' had status 309 > Error in parseGRASS(cmd) : g.region not parsed >> No, this is not expected (checked with R 2.12.1 on Native GRASS 6.4.0 on Windows XP). You needed to provide full traceback() output, and sessionInfo(), and which Windows; verbatim output from loading spgrass6 would also have been informative. Your problem is in your GRASS installation, as the message: running command 'g.region.exe --interface-description' had status 309 shows. Start GRASS 6.4.0 in MSYS mode, and try to run g.region.exe --interface-description from the console prompt. MSYS mode is helpful, because running R through the Layer Manager blocks the manager until R is terminated. Starting R in an existing location on Windows entails: Starting GRASS in MSYS mode, choosing location and mapset as normal (Spearfish as location for the example refered to) - this sets many GRASS environment variables that are needed by spgrass6; Starting R with the complete path, e.g.: "C:/Program Files/R/R-2.12.1/bin/i386/Rgui.exe R_LIBS=C:/Program Files/r_libs" (line break for mailer) in the MSYS console; Check that spgrass6 reports the correct location on loading. Hope this helps, Roger > > This is in R-2.12.1 and GRASS version 6.4 on Windows. Does this look > familiar, please? Any suggestions would be much appreciated. > > Thanks, > Erin > > > Erin M. Hodgess, PhD > Associate Professor > Department of Computer and Mathematical Sciences > University of Houston - Downtown > mailto: hodge...@uhd.edu > > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > -- 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 [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
