On Tue, Jun 5, 2018 at 2:51 PM, Frank David <[email protected]> wrote:
>
> Hi all Grass users,
>
> It's seems that r.series weights does not accept zero as weight... Is it
possible ?

Yes, weights must be positive.

> and so, why ?

A zero weight means that all values in this map are ignored. Zero weights
can also cause the sum of weights to be zero, leading to division by zero
and finally to +inf / -inf as a result.

Markus M
>
> I've got the following error message when running r.series with one
weight set to 0
>
> "/usr/local/grass-7.4.0svn/etc/python/grass/script/core.py",
> line 332, in handle_errors
>     returncode=returncode)
> grass.exceptions.CalledModuleError: Module run None
>
> Thank you for your comment.
>
> Frank
>
>
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