[R-sig-eco] Error in Maxent (dismo package)

[Torsten Hauffe]

Hi,

I can't try it but maybe you need a vector with all factorial predictors.
Hence, put them all in c().

me <- maxent(predictors, occtrain, factors=c("bion","morfo", "sed"))

On Tue, Sep 22, 2020 at 10:08 AM Irene Rojo <ire.rojo using gmail.com> wrote:

> Dear all,
>
> I am fitting maxent models within the dismo package but I have some doubts
> regarding the number of categorical variables (factors) that I can include
> in the model. All my variables are raster (.asc).
>
> When I perform the model with just one factor (me <- maxent(predictors,
> occtrain, factors="bion")) it runs and everything works fine, but when I
> try to add more factors (me <- maxent(predictors, occtrain, factors="bion",
> "morfo", "sed")) I get the following error:
>
> Error in .getMatrix(a) :
>   data should be  a matrix, data.frame, or SpatialPoints* object
>
> When I just include one factor (whatever the variable is) it works, so I
> don't know if it is a syntax problem and I am not including the rest of the
> factors in a proper way (separated by commas), or if it is not possible to
> add more than one factor.
>
> Any advice will be much appreciated!
>
> Thanks in advance,
>
> Irene
>
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