[STATSGRASS] moving-window analysis

[Carlos "Guâno" Grohmann]

Basic moving-window (ie, mean, stddev etc) is easy. The tricky
question is how to make a best-fit least squares inside that moving
window? I mean that it has to be a general function, so you can choose
the size of the window.

Carlos



On 6/6/07, G. Allegri <giohappy at gmail.com> wrote:
> In my experience the easier way to realize a moving-window analysys
> between rasters is to use r.mapcalc. I never did it in R. I knew that
> caTools package could do it someway... but I think using r.mapcla is
> more straightforward.
> Look at this nice article:
> http://casoilresource.lawr.ucdavis.edu/drupal/node/221
> --
> Giovanni
>
> 2007/6/6, Carlos Guâno Grohmann <carlos.grohmann at gmail.com>:
> > > What kind of data do you have?
> >
> > DEMs, some LiDAR, maybe
> >
> >
> >
> >
> > > 2007/6/6, Carlos Guâno Grohmann <carlos.grohmann at gmail.com>:
> > > > Hello. I was thinking what would be the best way to do a moving-window
> > > > analysis where the result is the deviation of values about a best-fit
> > > > plane?
> > > >
> > > > some modification to r.in.xyz?
> > > > r.mapcalc?
> > > > R? (which package, function..?)
> > > >
> > > > thanks
> > > >
> > > >
> > > >
> > > > --
> > > > +-----------------------------------------------------------+
> > > >               Carlos Henrique Grohmann - Guano
> > > >   Visiting Researcher at Kingston University London - UK
> > > >   Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
> > > > Linux User #89721  - carlos dot grohmann at gmail dot com
> > > > +-----------------------------------------------------------+
> > > > _________________
> > > > "Good morning, doctors. I have taken the liberty of removing Windows
> > > > 95 from my hard drive."
> > > > --The winning entry in a "What were HAL's first words" contest judged
> > > > by 2001: A SPACE ODYSSEY creator Arthur C. Clarke
> > > >
> > > > _______________________________________________
> > > > statsgrass mailing list
> > > > statsgrass at grass.itc.it
> > > > http://grass.itc.it/mailman/listinfo/statsgrass
> > > >
> > >
> >
> >
> > --
> > +-----------------------------------------------------------+
> >               Carlos Henrique Grohmann - Guano
> >   Visiting Researcher at Kingston University London - UK
> >   Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
> > Linux User #89721  - carlos dot grohmann at gmail dot com
> > +-----------------------------------------------------------+
> > _________________
> > "Good morning, doctors. I have taken the liberty of removing Windows
> > 95 from my hard drive."
> > --The winning entry in a "What were HAL's first words" contest judged
> > by 2001: A SPACE ODYSSEY creator Arthur C. Clarke
> >
> > _______________________________________________
> > statsgrass mailing list
> > statsgrass at grass.itc.it
> > http://grass.itc.it/mailman/listinfo/statsgrass
> >
>


-- 
+-----------------------------------------------------------+
              Carlos Henrique Grohmann - Guano
  Visiting Researcher at Kingston University London - UK
  Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
Linux User #89721  - carlos dot grohmann at gmail dot com
+-----------------------------------------------------------+
_________________
"Good morning, doctors. I have taken the liberty of removing Windows
95 from my hard drive."
--The winning entry in a "What were HAL's first words" contest judged
by 2001: A SPACE ODYSSEY creator Arthur C. Clarke