[GRASS-user] r.reclass using pipe from r.stats?

[Milton Cezar Ribeiro]

Dear all,
I have a raster map with all categories (~50)
and I have about 500 spatial subsets of the same
original map. As is expected, each of spatial subset
map have less categories than the original map.

I can check the list of categories for each subset
map using r.stats. But I need to generate a new
set of maps with the spatial range of original map,
but keeping only those classes of my original map.

Just supose that "r.stats mysubset1" result something
like:

2
4
9
11
43

So, I would like that my new map with my full spatial
range keep only these 5 categories, and all other
categories come to be "no data".

I know if I generate a rule file with
2=2
4=9
11=11
43=43
I can get the desired results, but as the number
of spatial subsets is very large I would like turn it
more operational.

Is there a suggestion of how can I do this using pipe like
r.stats mysubset1 | r.reclass mysubset1 mysubset1_fullrange rules= -??

Thanks for all
Best regards

Miltinho Brazil
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