[GRASS-user] v.cellstats

GRASS GRASS user
1

Hello all,
are there iny news on v.cellstats?

bye

--
+-----------------------------------------------------------+
              Carlos Henrique Grohmann - Guano
  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

2

are there iny news on v.cellstats?

try r.in.xyz.

http://grass.ibiblio.org/grass61/manuals/html61_user/r.in.xyz.html

Hamish

3

Thanks Hamish. It seems to be what I need, just that.. it doesen't
have a 'mode' option in the stats... that's what I really need

Carlos

On 8/23/06, Hamish <hamish_nospam@yahoo.com> wrote:

> are there iny news on v.cellstats?

try r.in.xyz.

http://grass.ibiblio.org/grass61/manuals/html61_user/r.in.xyz.html

Hamish

--
+-----------------------------------------------------------+
              Carlos Henrique Grohmann - Guano
  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

4

Carlos "Guâno" Grohmann wrote:

> > are there iny news on v.cellstats?
>
> try r.in.xyz.
>
> http://grass.ibiblio.org/grass61/manuals/html61_user/r.in.xyz.html

Thanks Hamish. It seems to be what I need, just that.. it doesen't
have a 'mode' option in the stats... that's what I really need

No mode, sorry. r.univar, r.in.xyz, etc still wait for someone to help
write advanced statistics in an efficient way. From the TODO section of
r.in.xyz help page:

TODO

* Support for advanced statistics (in parallel with r.univar).
Especially useful for dealing with outliers would be median and 5-10%
trimmed means.

The equivalent module from GRASS 5 (s.cellstats) contains code for
additional statistical options, claiming to use only 16 bytes per cell:
skewness, kurtosis, mean of squares, mean of absolute values, first
quartile, median, third quartile.

Note that "mode" isn't on that list, however if you want one of those
you can use GRASS 5.4 to create a raster which is fully compatible with
GRASS 6. You can have multiple versions of GRASS installed without
problems- you might try GRASS 5.4 from CVS to get around problems
reading 3D region settings from GRASS 6 which don't exist in GRASS 5.

s.in.ascii
s.cellstats
s.to.rast

out of curiosity, what is the nature of the dataset? LIDAR? Swath sonar?

Hamish

5

Hamish napisa?(a):

Carlos "Guâno" Grohmann wrote:

are there iny news on v.cellstats?

try r.in.xyz.

http://grass.ibiblio.org/grass61/manuals/html61_user/r.in.xyz.html

Thanks Hamish. It seems to be what I need, just that.. it doesen't
have a 'mode' option in the stats... that's what I really need

Does r.mode help?

Maciek

6

This is a little late, but GMT has a blockmode commandline function (use on data prior to loading into grass):

http://gmt.soest.hawaii.edu/gmt/doc/html/blockmode.html

David

On 8/24/06, Maciej Sieczka <tutey@o2.pl> wrote:

Hamish napisa?(a):

Carlos “Guâno” Grohmann wrote:

are there iny news on v.cellstats?
try r.in.xyz.

http://grass.ibiblio.org/grass61/manuals/html61_user/r.in.xyz.html
Thanks Hamish. It seems to be what I need, just that… it doesen’t
have a ‘mode’ option in the stats… that’s what I really need

Does r.mode help?

Maciek

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