[GRASS-dev] GRASS 6.4.3 release planning, mapcalc expressions in wingrass

[Helena Mitasova]

I am happy to report that the expressions with || now work on windows from command console when quotes are used.
Thank you Anna and Glynn for solving this long standing problem for wingrass users,

Helena

On Jul 4, 2013, at 4:45 PM, Anna Petrášová wrote:

> 
> 
> 
> On Tue, Jul 2, 2013 at 8:57 PM, Anna Petrášová <kratochanna at gmail.com> wrote:
> Hi,
> 
> 
> On Fri, Jun 28, 2013 at 2:29 AM, Helena Mitasova <hmitaso at ncsu.edu> wrote:
> regarding the r.mapcalc issue in command console on wingrass -
> (sorry I did not make it clear it was for wingrass - it always worked well on Mac and linux)
> 
> It is not critical, windows users can still use the mapcalculator GUI where it runs OK,
> but the r.mapcalc in the command console still does not seem to work - tried by a student
> using June 26 snapshot this is what she says:
> 
> Here are examples of the commands run and the errors received:
> r.mapcalc urban2_30m=if(landuse96_28m==1 || landuse96_28m==2,landuse96_28m,null())
> syntax error, unexpected $end, expecting ')'
> Parse error
> 'landuse96_28m' is not recognized as an internal or external
> 
> command,
> operable program or batch file.
> 
> r.mapcalc MASK=if((elevation<100 && elevation>60) && (landuse96_28m==1 || landuse96_28m==2),1,null())
> 1 was unexpected at this time.
> 
> This is the same we were getting in GRASS6.4.3RC2 and apparently the proposed solutions did not work
> http://lists.osgeo.org/pipermail/grass-dev/2013-February/062047.html
> http://lists.osgeo.org/pipermail/grass-dev/2013-March/062607.html
> 
> 
> I had the opportunity to test Glynn's patch (the second link above) on Windows and it seems to solve the problems. From the discussion I can see that Markus already tested it but he was not successful, so I applied the patch to 6.5 first.
> All the commands causing problems are now working with both (", ') quotes and without, only the command with || requires quotes.
> 
> Anna
> 
> Seems to work, I applied it to all branches, please test (using e.g. the commands above).
> 
> Anna
> 
> 
> 
> 
> if I get this confirmed I will file a bug report (I thought I already did, but it is not there).
> If it is not fixable it should be at least mentioned on the known issues web page
> http://grasswiki.osgeo.org/wiki/WinGRASS_Current_Status#Raster_modules
> 
> Helena
> 
> 
> 
> 
> >
> > Helena:
> >> I am also wondering whether the r.mapcalc expressions with || (or)
> >> now run from the wxGUI command console.
> >
> > I just tried on linux 6.4.3svn wxGUI command console:
> 
> >   r.mapcalc "either = 0 || 1"
> > and it worked.
> >
> > In general I wouldn't be surprised if full command line quoting took
> > years and huge amounts of effort to (re)perfect. And even then, does
> > it try to follow Bash conventions, or python, or DOS, or some mix of
> > all those? How much do we try to (re)teach about command line
> > techniques in our own docs? Will unquoted input=C:\Users\files\data.txt
> > always be parsed to input=C:Usersfilesdata.txt (literal \U, \f, \d)
> > in the command console in that case?
> >
> >
> > best,
> 
> > Hamish
> >
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