
Hi guyz

I have problems running the gwr when I include the categorical/nominal
variables with 2 to 3 levels. Could it be that gwr does not cater for such
variables?  I tried indicating that these variables are factors but this is
not helping. 
Firstly, the cross-validation bandwidth (using gwr.sel) cannot be computed
(gives warnings) and the gwr does not give the parameter estimates (Error in
abs (coef.se <- xm[, cs.ind, drop = FALSE]) :    Non-numeric argument to
mathematical function.)
 I don’t even understand what the error implies. Can somebody help please?

Thanks,
Sisi1.

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