Re: [R] best predictive model for mixed catagorical/continuous variables

2010-10-25 Thread Robert Baer
I would expect that there will be interactions between variables eg. if the vegetation is grassland then the vegetation height variable will mediate the interaction, if the vegetation is arable then crop type will be more significant. Would it be possible to use GLM or GAM models for this type

[R] best predictive model for mixed catagorical/continuous variables

2010-10-24 Thread jamessc
Would anybody be able to advise on which package would offer the best approach for producing a model able to predict the probability of species occupation based upon a range of variables, some of them catagorical (eg. ten soil types where the numbers assigned are not related to any