[GRASS-dev] d.vect.thematic: v.univar.sh -> v.univar?

[Daniel Calvelo]

Replying to myself twice, sorry.

After reading v.univar/main.c more thoroughly, I think I'm
understanding the issue: v.univar.sh is *not* a shell equivalent of
v.univar. Actually, v.univar.sh should have been called v.db.univar.
In v.univar the statistics collected are those of the vector map, not
only of its database: a type=area in v.univar should mean collect
statistics weighted by area and so on.

For d.vect.thematic as it stands now, no information is used about the
geometry, so it only depends on the currently implemented
type=point,centroid behaviour of v.univar.

I commited to CVS.

Daniel.

On 5/2/07, Daniel Calvelo <dca.gis at gmail.com> wrote:
> Ooops, sorry for the noise. I managed to recompile CVS and of course I
> had gotten it all wrong. v.univar and v.univar.sh have different
> interfaces.
>
> Good news: the attached d.vect.thematic version works using v.univar
>
> Bad news: as pointed out in v.univar source, extended stats
> (nonparametric) are only available for points/centroids
>
> Martin, why is it harder to calculate those for area/boundary/line ?
> Aren't we just accessing the db corresponding to the layer?
>
> So currently, we can't fully replace v.univar.sh with v.univar for
> d.vect.thematic purposes. The clean course of action is to extend
> v.univar to calculate extended stats for the rest of types.
>
> Daniel.
>
> On 5/2/07, Daniel Calvelo <dca.gis at gmail.com> wrote:
> > Markus, could you try the version attached? I think I got it right but
> > can't access a CVS build right now, so v.univar -e is unavailable for
> > me right now.
> >
> > If ok, I'll commit to HEAD.
> >
> > Daniel.
> >
> > On 5/2/07, Markus Neteler <neteler at itc.it> wrote:
> > > It seems to be slightly more complicated (I tried), so I
> > > leave it for now.
> > >
> > > Markus
> > >
> > > On Tue, May 01, 2007 at 02:49:14PM -0700, Michael Barton wrote:
> > > > If it does extended stats now and the output is the same, it should be an
> > > > easy switch.
> > > >
> > > > Michael
> > > >
> > > >
> > > > On 5/1/07 8:25 AM, "Markus Neteler" <neteler at itc.it> wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > can we safely change v.univar.sh -> v.univar in d.vect.thematic?
> > > > > This might speed up calculations...
> > > > >
> > > > > Markus
> > > > >
> > > > >
> > > >
> > > > __________________________________________
> > > > Michael Barton, Professor of Anthropology
> > > > School of Human Evolution & Social Change
> > > > Center for Social Dynamics & Complexity
> > > > Arizona State University
> > > >
> > > > phone: 480-965-6213
> > > > fax: 480-965-7671
> > > > www: http://www.public.asu.edu/~cmbarton
> > > >
> > > >
> > >
> > > --
> > > Markus Neteler  <neteler itc it>  http://mpa.itc.it/markus/
> > > FBK-irst -  Centro per la Ricerca Scientifica e Tecnologica
> > > MPBA - Predictive Models for Biol. & Environ. Data Analysis
> > > Via Sommarive, 18        -       38050 Povo (Trento), Italy
> > >
> > > _______________________________________________
> > > grass-dev mailing list
> > > grass-dev at grass.itc.it
> > > http://grass.itc.it/mailman/listinfo/grass-dev
> > >
> >
> >
> > --
> > -- Daniel Calvelo Aros
> >
> >
>
>
> --
> -- Daniel Calvelo Aros
>
>


-- 
-- Daniel Calvelo Aros