[GRASS-user] grass.script.raster.mapcalc and multiple computations

[Panagiotis Mavrogiorgos]

Hi everyone,

Is it possible to perform multiple computations using
grass.script.raster.mapcalc()? What I want is to run something like this
(example taken from r.mapcalc documentation):

r.mapcalc <<EOF
> $GIS_OPT_OUTPUT.r = r#$GIS_OPT_FIRST * .$GIS_OPT_PERCENT + (1.0 -
> .$GIS_OPT_PERCENT) * r#$GIS_OPT_SECOND
> $GIS_OPT_OUTPUT.g = g#$GIS_OPT_FIRST * .$GIS_OPT_PERCENT + (1.0 -
> .$GIS_OPT_PERCENT) * g#$GIS_OPT_SECOND
> $GIS_OPT_OUTPUT.b = b#$GIS_OPT_FIRST * .$GIS_OPT_PERCENT + (1.0 -
> .$GIS_OPT_PERCENT) * b#$GIS_OPT_SECOND
> EOF


When I give an expression as a multiline string, I get an error like this
one:

Invalid map <i>
> Parse error
> ERROR: parse error
> ERROR: An error occurred while running r.mapcalc


with kind regards,
Panos
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