[R] GAM weights

daniel.pastor@uam.es daniel.pastor at uam.es
Wed Jul 27 12:07:21 CEST 2005

Dear all,
we are trying to model some data from rare plants so we always have less than 50
1x1 km presences, and the total area is about 550.000 square km. So we have a
real problem, when we perform a GAM, if we consider only the same amount of
absences than presences.
We have thought to use a greater number of absences but in this case we shoud
downweight them.
Does anybody know how to use the “wheight” term?
thank you in advance

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