Hi!
What happened to r.moran? I'd need to calculate Moran's I for a rastermap, but I'm unable to find r.moran in GRASS 6.1. If it has dropped off due to lack of a maintainer, please let me know, and I will gladly update it from GRASS 5.4. Is there perhaps another way to to calculate Moran's I?
--Wolf
--
<:3 )---- Wolf Bergenheim ----( 8:>
What happened to r.moran? I'd need to calculate Moran's I for a
rastermap, but I'm unable to find r.moran in GRASS 6.1. If it has
dropped off due to lack of a maintainer, please let me know, and I
will gladly update it from GRASS 5.4. Is there perhaps another way to
to calculate Moran's I?
It's not in 5.4, just the man page is.
It's not the GRASS 5 CVS either, you have to look in the GRASS 4.3
source code to find it:
http://grass.ibiblio.org/grass43/source/
src/raster/r.moran
src/raster/r.moran/Gmakefile
src/raster/r.moran/README
src/raster/r.moran/interface.c
src/raster/r.moran/lvar.c
src/raster/r.moran/main.c
src/raster/r.moran/moran.c
src/raster/r.moran/moran.h
src/raster/r.moran/open_files.c
src/raster/r.moran/process.c
This means you'll need to add NULL support (instead of 0 as null).
Maybe easier to use the GRASS/R interface and perform the operation in R?
http://biomserv.univ-lyon1.fr/library/spdep/html/moran.test.html
http://grass.ibiblio.org/statsgrass/index.php#grassR
I think we could use a new wiki page listing all older modules not
ported; not just the 5.4->6.0 list. e.g. r.fuzzy, d.viewproj, r.casc2d,
etc.? May save someone some trouble. This probably has to be done by
hand. 
ps- How do I get a copy of GRASS 4.2.1?
swig people: I notice an effort in the GRASS 5 cvs by Mike from two
years ago, maybe useful:
http://freegis.org/cgi-bin/viewcvs.cgi/grass/src.todo/swig/
Hamish
On Wed, 22 Mar 2006, Hamish wrote:
What happened to r.moran? I'd need to calculate Moran's I for a
rastermap, but I'm unable to find r.moran in GRASS 6.1. If it has
dropped off due to lack of a maintainer, please let me know, and I
will gladly update it from GRASS 5.4. Is there perhaps another way to
to calculate Moran's I?It's not in 5.4, just the man page is.
It's not the GRASS 5 CVS either, you have to look in the GRASS 4.3
source code to find it:
http://grass.ibiblio.org/grass43/source/
Thanks. I'll have to see. It seem that I actually need to do this for vector areas. so I guess I could make v.autocorrelate that would support Moran's I and perhaps later Geary's C and other methods. I noticed that v.autocorr used to exist in grass 5 (or is this again only the manual page?). Anyway, I'll have a look and see if it is of any use. I know that the vector engine has changed since then, and much of the code is probably useless, but the algorithms might be of use... anyway I need it to support a selected attribute field.
This means you'll need to add NULL support (instead of 0 as null).
Sure.
Maybe easier to use the GRASS/R interface and perform the operation in R?
http://biomserv.univ-lyon1.fr/library/spdep/html/moran.test.html
http://grass.ibiblio.org/statsgrass/index.php#grassR
You might be right. But I guess it wouldn't work for vectors?
I think we could use a new wiki page listing all older modules not
ported; not just the 5.4->6.0 list. e.g. r.fuzzy, d.viewproj, r.casc2d,
etc.? May save someone some trouble. This probably has to be done by
hand.
Yes that would be most helpful. Also it could state the reason for the drop, like that some other module can handle this too, or blank for unknown?
--Wolf
--
<:3 )---- Wolf Bergenheim ----( 8:>
On Wed, 22 Mar 2006, Wolf Bergenheim wrote:
On Wed, 22 Mar 2006, Hamish wrote:
>> What happened to r.moran? I'd need to calculate Moran's I for a
>> rastermap, but I'm unable to find r.moran in GRASS 6.1. If it has
>> dropped off due to lack of a maintainer, please let me know, and I
>> will gladly update it from GRASS 5.4. Is there perhaps another way to
>> to calculate Moran's I?
>
> It's not in 5.4, just the man page is.
>
> It's not the GRASS 5 CVS either, you have to look in the GRASS 4.3
> source code to find it:
> http://grass.ibiblio.org/grass43/source/Thanks. I'll have to see. It seem that I actually need to do this for
vector areas. so I guess I could make v.autocorrelate that would support
Moran's I and perhaps later Geary's C and other methods. I noticed that
v.autocorr used to exist in grass 5 (or is this again only the manual
page?). Anyway, I'll have a look and see if it is of any use. I know that
the vector engine has changed since then, and much of the code is probably
useless, but the algorithms might be of use... anyway I need it to support
a selected attribute field.> This means you'll need to add NULL support (instead of 0 as null).
Sure.
>
> Maybe easier to use the GRASS/R interface and perform the operation in R?
> http://biomserv.univ-lyon1.fr/library/spdep/html/moran.test.html
> http://grass.ibiblio.org/statsgrass/index.php#grassR
>You might be right. But I guess it wouldn't work for vectors?
No, vectors are fully supported - in fact a raster would be treated as
cell centre points. See the range of functions for building lists of
neighbours in the R spdep package. Are your vectors points or polygons?
What criteria for neighbours do you need? We can continue thread this on
the STATGRASS list if you like.
Roger
>
> I think we could use a new wiki page listing all older modules not
> ported; not just the 5.4->6.0 list. e.g. r.fuzzy, d.viewproj, r.casc2d,
> etc.? May save someone some trouble. This probably has to be done by
> hand.Yes that would be most helpful. Also it could state the reason for the
drop, like that some other module can handle this too, or blank for unknown?--Wolf
--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand@nhh.no