r.average
r.average - Finds the average of values in a cover map within areas assigned the same category value in a user-specified base map.
Raster (r.*)
ParameterRaster|base|Name of base raster map|False
ParameterRaster|cover|Name of cover raster map|False
ParameterBoolean|-c|Cover values extracted from the category labels of the cover map|False
OutputRaster|output|Name for output raster map