[GRASS-dev] r.multi

[Hamish]

Glynn Clements wrote:

> Aside:
> 
> I've wondered whether it would be worth having a general-purpose
> "g.multi" command which executes a command "template" on multiple
> maps. This first occurred to me in the context of handling colour
> images as R/G/B channels; i.e. having a g.rgb command which would be
> used like e.g. "g.rgb r.rescale in=inmap.% out=outmap.% ...", where
> the % would be replaced with r/g/b on each run.
> 
> The main reason for not implementing it at that time was that, on the
> one hand, it should probably be made more general, but on the other
> hand, a more general version would require various options, and you
> can't (currently) use G_parser() for a command which has an open-ended
> list of options. Thus it would be necessary to extend G_parser() to
> allow unknown options to be accepted.


some modules output to map.r map.g map.b, and some to map.1 map.2 map.3.
not so general :-/


I've never fully understood the use of  "file {cell,cellhd}"
could something like that be used?


In the mean time, 
  for MAP in `g.mlist pat=[regex]` ; do 
    ..
  done
is very nice for these tasks.


Hamish