Error in Maxent (dismo package)
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 at 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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