[Biomod-commits] Factors as predictive variables

[Horchler at bafg.de]

Hello,

I am wondering if I can use factorial vairables in BIOMOD?
I want to include type of land-use codes as "grassland" or "forest" in
my analysis but get an error message:

----------------------------------- 
Modelling summary 
----------------------------------- 
Number of species modelled :            6
Alopprat, Urtidioi, Glycmaxi, Rubucaes, Crxacuta, Rorisylv

numerical variables :                   UFD.n, vmhq, Hum, S
factorial variables :                   Nutzung

number of evaluation repetitions :      0
number of pseudo-absences runs :        0
models selected :                       GAM, GBM, GLM, RF
total number of model runs :            24
----------------------------------- 


#####                    Alopprat                       #####
Model=GAM spline 
         3  Degrees of smoothing 
Fehler in Summary.factor(c(1L, 1L, 1L, 1L, 1L, 3L, 3L, 1L, 1L, 1L, 3L,
: 
  sum not meaningful for factors



What can I do about this?

Thnaks in advance!
Peter