[GRASS-dev] [GRASS GIS] #739: v.mkgrid parameter needs two values but is multiple=NO

[GRASS GIS]

#739: v.mkgrid parameter needs two values but is multiple=NO
-------------------------+--------------------------------------------------
 Reporter:  rsbivand     |       Owner:  grass-dev at lists.osgeo.org
     Type:  defect       |      Status:  new                      
 Priority:  normal       |   Milestone:  6.4.0                    
Component:  default      |     Version:  unspecified              
 Keywords:               |    Platform:  Unspecified              
      Cpu:  Unspecified  |  
-------------------------+--------------------------------------------------
 When run from the command line, v.mkgrid map=xxx grid=100,50 works
 (main.c, line 74), but in wxpython and execGRASS() in spgrass6 in R, the
 --interface-description of grid->multiple = NO is respected, and only one
 value can be passed. This then fails (in wxpython here) with:


 {{{
 v.mkgrid --overwrite map=grd grid=100
 ERROR: option <grid> must be provided in multiples of 2
        You provided 1 items:
        100
 }}}


 In R (using --interface-description):


 {{{
 > execGRASS("v.mkgrid", flags="overwrite", parameters=list(map="grd",
 grid=as.integer(100)))

 ERROR: option <grid> must be provided in multiples of 2
        You provided 1 items:
        100

 }}}

 or:


 {{{
 > execGRASS("v.mkgrid", flags="overwrite", parameters=list(map="grd",
 grid=rep(as.integer(100), 2)))
 Error in doGRASS(cmd, flags = flags, parameters = parameters) :
   Parameter <grid> has multiple values
 }}}


 This conflicts with the single comma in grid->key_desc, which implies two
 values, but grid->multiple = NO. The same seems to apply to box=. It looks
 as though there is no conflict on the command line when multiple = NO
 provided that the number of values agrees with # commas in key_desc plus
 one, but that this does not work when --interface description is used.

-- 
Ticket URL: <http://trac.osgeo.org/grass/ticket/739>
GRASS GIS <http://grass.osgeo.org>