[GRASS-user] v.colors rules

GRASS GRASS user
1

Hi to all

How v.colors with option rules works ?

I tried:

cat color.txt
1 red
2 green
3 blue
4 orange
5 purple

v.db.select mypoints
cat
5
1
4
3
2

v.colors map=mypoints column=cat rules=color.txt
ERROR: Pick one of color, rules, or raster options

v.colors map=mypoints color=rules column=cat rules=color.txt
ERROR: value <rules> out of range for parameter <color>

v.colors map=mypoints color=rules.txt
ERROR: value <rules.txt> out of range for parameter <color>

Thanks
--
--
Paolo C.
Lat. 44° 39' 11.08'' N Long. 7° 23' 25.26'' E

2

On Mon, 2009-02-09 at 12:12 +0100, Paolo Craveri wrote:

Hi to all

How v.colors with option rules works ?

I tried:

cat color.txt
1 red
2 green
3 blue
4 orange
5 purple

v.db.select mypoints
cat
5
1
4
3
2

v.colors map=mypoints column=cat rules=color.txt
ERROR: Pick one of color, rules, or raster options

v.colors map=mypoints color=rules column=cat rules=color.txt
ERROR: value <rules> out of range for parameter <color>

v.colors map=mypoints color=rules.txt
ERROR: value <rules.txt> out of range for parameter <color>

Thanks
--

Ciao Paolo.

It doesn't work for me either!
Nikos

# query samples_unburned6 for unique values in the 2nd column
v.db.select samples_unburned6 | cut -d"|" -f2 | sort -u

1
3
332
5
value

# v.colors with random (or other) colors works just fine
v.colors samples_unburned6 column=value color=random

# v.colors "rules=" or "raster" fails
# first the *rules*
cat samples_color.rules

-333 255:0:0
-331 0:255:0
1 255:0:0
2 255:255:0
3 0:255:0
5 0:0:255
332 200:200:200
334 0:0:0

# try to use "rules="
v.colors samples_unburned6 column=value rules=samples_color.rules

ERROR: Pick one of color, rules, or raster options

# list the colr file for some raster map
cat training_6_prefire

% -333 334
-333:255:0:0 -331:0:255:0
-331:0:255:0 1:255:0:0
1:255:0:0 2:255:255:0
2:255:255:0 3:0:255:0
3:0:255:0 5:0:0:255
5:0:0:255 332:200
332:200 334:0

# try to use "raster="
v.colors samples_unburned6 column=value raster=training_6_prefire

ERROR: Pick one of color, rules, or raster options

3

On Mon, Feb 9, 2009 at 12:12 PM, Paolo Craveri <pcraveri@gmail.com> wrote:

Hi to all

How v.colors with option rules works ?

Paolo,

in line 160 of the script, can you change

   if [ -n "$OPTNAME" ] ; then
to
   if [ -z "$OPTNAME" ] ; then

and report back? For me it works like this (maybe it
breaks something else?!).

Markus

4

On Mon, Feb 9, 2009 at 1:44 PM, Markus Neteler <neteler@osgeo.org> wrote:

On Mon, Feb 9, 2009 at 12:12 PM, Paolo Craveri <pcraveri@gmail.com> wrote:

Hi to all

How v.colors with option rules works ?

Paolo,

in line 160 of the script, can you change

forget that.

The problem is that the color "bcyr" is predefined.

Try to deleted line 66:

#% answer: bcyr

and report back. Then it seems to work. I tested color= and
rules=.

Also added a new example to the manual page.

Markus

5

2009/2/9 Markus Neteler <neteler@osgeo.org>:

Try to deleted line 66:

#% answer: bcyr

ok, done, but:

v.colors mypoints rules=color.txt column=cat
ERROR: Pick one of color, rules, or raster options

I commented lines from 163 to 166 (test over options) and works:

v.colors mypoints rules=color.txt column=cat
v.db.select mypoints
cat|GRASSRGB
5|127:0:255
1|255:0:0
4|255:127:0
3|0:0:255
2|0:255:0

ciao
--
--
Paolo C.
Lat. 44° 39' 11.08'' N Long. 7° 23' 25.26'' E

6

On Mon, Feb 9, 2009 at 2:56 PM, Paolo Craveri <pcraveri@gmail.com> wrote:

2009/2/9 Markus Neteler <neteler@osgeo.org>:

Try to deleted line 66:

#% answer: bcyr

ok, done, but:

v.colors mypoints rules=color.txt column=cat
ERROR: Pick one of color, rules, or raster options

Are you sure that you ran
make
and, if needed,
make install
afterwards?

Markus

7

2009/2/9 Markus Neteler <neteler@osgeo.org>:

Are you sure that you ran
make
and, if needed,
make install
afterwards?

Markus

Ok now it works. Many thanks

--
--
Paolo C.
Lat. 44° 39' 11.08'' N Long. 7° 23' 25.26'' E

8

On Mon, Feb 9, 2009 at 8:14 PM, Paolo Craveri <pcraveri@gmail.com> wrote:

2009/2/9 Markus Neteler <neteler@osgeo.org>:

Ok now it works. Many thanks

Perfect. Fixed in all relevant GRASS versions (SVN).

Markus