[GRASS5] r.average, r.statistics

[Aleksey Naumov]

Dear GRASS developers,

I have two maps: 'landuse' (CELL) and 'slope' (FCELL), and I need to average 
'slope' for every category in 'landuse'. Seems like r.average would do it, so 
I do:

GRASS:~ > r.average base=landuse cover=slope output=landuse.slope

But:

1) r.average help says:

"The output map is actually a reclass of the base map (see r.reclass), and 
will have exactly the same category values as the base map. The averaged 
values computed by r.average are stored in the output map's category labels 
file."

But this is not what I see from r.info, r.report, r.cats! For example:

GRASS:~ > r.report landuse.slope
...
|----------------------------------------------------------------------------|
|                            Category Information                            |
|                  #|description                                             |
|----------------------------------------------------------------------------|
|       0.2-0.266667|from  to                                                |
|  0.466667-0.533333|from  to                                                |
|       0.533333-0.6|from  to                                                |
|       0.6-0.666667|from  to                                                |
|  0.666667-0.733333|from  to                                                |
...

This looks totally different from what help promices:
   - averaged values were put in category values, not labels
   - category labels are meaningless