r.li.mpa(1)

NAME
r.li.mpa

DESCRIPTION
r.li.mpa (mean pixel attribute) calculates the average value of the attribute of all the non-null cells in the sampling area as:
with:

        i: attribute

        m: number of non-null attributes in the sampling area

        wi: number of cells of attribute i

        size: size of sampling area (in cells)

EXAMPLES
To calculate mean pixel attribute index on map my_map, using my_conf configuration file and saving results in my_out file run:
r.li.mpa map=my_map conf=my_conf output=my_out

NOTES
Do not use absolute path names for output files. They are raster if moving window disposition was selected, otherwise they are in ~/.r.li/output folder.
If input raster is full of null values r.li.mpa consider to have 0 patch.
If area is 0 r.li.mpa returns -1; it is possible only if the raster is masked
If you want to have null values instead run
r.null setnull=-1 map=my_map
after index calculation.

SEE ALSO
r.li r.le

AUTHORS
Serena Pallecchi student of Computer Science University of Pisa (Italy).
Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it)

Last changed: $Date: 2011-08-16 11:13:05 +0200 (Tue, 16 Aug 2011) $

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