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2003 Sep 09
1
tree mortality risk model using glm()
Dear all, I've used glm(family=binomial(link="logit")) several times, but now I think that a log link is more appropriate. I want to fit a model for probability of tree fall (TF)), with tree diameter (dbh) and soil moisure (soil) as predictors. A large number of trees have been checked every second year whether they stand up (0) or have fallen (1). I assume that the tree fall probability is predicted by TF = 1 - exp(-(dbh + soil)) log(1 - TF) = -(dbh + soil) I thought the following call would fit the model, but I...