[R] apply model predictions over larger area with predict()
K.Fleischer at student.uva.nl
Wed Oct 15 09:33:52 CEST 2008
I have built glm models based on presences/absences and a number of
predictor maps and would like to compute habitat suitability based on
the modelled coefficients.
I thought this is pretty straight forward and wanted to use predict()
and supply the new data in a data frame, with one column for each
However, I do get an error msg warning me that the number of rows for
old and new data do not match.
the script looks like that:
#whereby temp,prec,elev are in vector format and contain the elements
on species presence/absence; species is vector of 0's and 1's
(precipitation),as.vector(elevation)) # (length=7526)
Warning message: 'newdata' had 7526 rows but variable(s) found have
Ive searched quite a while for the answer now, has anyone encountered
that problem before?? thanx in advance.
University of Amsterdam
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