[GRASS-user] Using a variable inside GRASS commands with Python code/ grass.mapcalc

[Helmut Kudrnovsky]

>grass.mapcalc("viewshed_cum = viewshed + viewshed_cum", overwrite = True,
quiet = True)
>
>It seems that expressions like sum = c + sum does not work inside
grass.mapcalc.Is there any alternative or other way around to get this done?
I am using GRASS 7 in Windows 7.

in the MS windows operating system, opened files can't be overwritten (a
operating system feature), therefore sum = c + sum isn't work in windows.
and AFAIK don't assume that it's always working correctly in linux.





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best regards
Helmut
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