[GRASSLIST:3304] r.stats

[Gordon Keith]

I'm working my way through getting various statistics out of grass 
using r.statistics, and things seem a little broken. I'm currently 
running 5.0 pre1, but there is no mention of fixes to these routines in 
the release notes.

Has anything changed since pre1 to make it worth getting a more recent 
version?

Particular problems I am having:

> r.statistics base=facies cover=gabo20_slope method=average 
out=avg_slope
Sorry, <z> is not a valid flag


> r.statistics base=facies cover=gabo20_slope method=median 
out=avg_slope
r.stats: ERROR reading r.stats output
> ERROR: no rules specified


> r.median base=facies cover=gabo20_slope out=avg_slope
r.stats: ERROR reading r.stats output
> ERROR: no rules specified


r.statistics method=min or max gives the first base category a value of 
0 and omits all the other categories.


r.average works, but formats the output such that r.stats -l doesn't 
give meaningful results eg:

> r.statistics base=facies cover=gabo20_slope method=stddev 
out=std_slope
> r.stats -l std_slope
6 1.201934
7 4.670386
8 1.855619
9 2.427760
10 2.465637
* no data

is good, but 

> r.average  base=facies cover=gabo20_slope out=avg_slope
> r.stats -l avg_slope
r.stats: 0.419177-0.427731 from  to
0.727111-0.735665 from  to
0.761326-0.769879 from  to
2.591819-2.600373 from  to
* no data

is useless.

I can get at the results of r.average via r.info, but it takes a lot 
more reformatting.

Regards
Gordon 
-- 

Gordon Keith
Programmer/Data Analyst
Marine Acoustics
CSIRO Marine Research
http://www.marine.csiro.au

"But what... is it good for?"
- Engineer at Advanced Computing Systems Division of IBM, 1968,
commenting on the role of the microchip.