[GRASS-user] r.regression.multi for logistic regression - it is possible?

Roberto Marzocchi roberto.marzocchi at gmail.com
Fri Sep 5 02:46:28 PDT 2014

 Dear all,

I have dichotomous data (occurrence 1 and non-occurence 0) and I want to
use the  logistic regression method in order to obtain susceptibility map
of landslide occurrence.

I try to use r.regression.multi, but I am not sure to correctly define the
mapy variable..

I try to use r.mapcalc


obtaining a map that go from -11.5 (not occurrence) to +11.5 (occurrence)

when I try to use r.regression.multi I obtain a lot of null values in
residuals and estimates map.

i do not understand why..

Thanks in advanced for the attention
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