[GRASS-dev] [bug #5202] (grass) Bug with floating point maps in r.stats

Request Tracker grass-bugs at intevation.de
Thu Oct 12 05:25:12 EDT 2006


this bug's URL: http://intevation.de/rt/webrt?serial_num=5202
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Subject: Bug with floating point maps in r.stats

Platform: GNU/Linux/x86
grass obtained from: CVS
grass binary for platform: Compiled from Sources

Hi,
there is a bug in r.stats.
The cell counting seems to be wrong.

Using the test suite mapset i get the following result:

Mapset <testmapset> in Location <TestLocation>                                                                                                                                    GRASS 6.3.cvs > g.region -p res=200

GRASS 6.3.cvs > r.mapcalc "stat_test=col()*1.0"

GRASS 6.3.cvs > r.stats -npc input=stat_test nsteps=10
 100%
1-1.9 10  12.50%
1.9-2.8 10  12.50%
2.8-3.7 10  12.50%
3.7-4.6 10  12.50%
4.6-5.5 10  12.50%
5.5-6.4 10  12.50%
6.4-7.3 10  12.50%
7.3-8.2 10  12.50%
8.2-9.1 10  12.50%
9.1-10 10  12.50%

GRASS 6.3.cvs > r.stats -npc input=stat_test nsteps=2
 100%
1-5.5 90 102.27%
5.5-10 10  11.36%  <------------ ???
                                                                                                                                                                                                                                                                          GRASS 6.3.cvs > r.stats -npc input=stat_test nsteps=3
 100%
1-4 50  57.47%
4-7 40  45.98%
7-10 10  11.49%  <------------ ???

Best regards
Soeren

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