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Sorry to take everyone's time. I found a negative value that was causing the problem. Chris Wilcox Dr. Chris Wilcox Research Fellow Department of Zoology and Entomology University of Queensland St. Lucia 4072 QLD Australia email: c.wilcox at...

Hi all, I am using CLMM in package ordinal to model the condition of animal carcasses (on a 1 ? 5 scale of decay) in an experiment evaluating the relationship between time since death and condition. I am fitting models to...

I am trying to use the glm.nb proceedure in the new MASS library. I have count data (of snails) taken from a number of habitats (artesian springs). I want to model the abundances, including an effect of the organic...

I am just starting to use R, converting over from SAS. I want to estimate the upper quartile in a scatterplot of demographic rates against rainfall in a small mammal population. The data looks like this: | |* * <- point in question |* |* * |* * |* * * |* * * * * * |_______________________________________ Based...

I am trying to fit the following linear model to logged per capita fecundity data (ie number of babies per female) for a mouse: RsNRlS <- glm(formula = ln.fecundity ~ summer.rainfall + N + lagged.rainfall + season, ....) I am using this relationship...

Dear List, My student and I are looking for an optimizer for a nonlinear optimization problem we are working on. The problem we are working on is to try to pick a set of islands on which to eradicate rats...

Hi all, I am trying to fit a gam using mgcv which has a mix of smooth and parametric terms. The model is for some count data on fish catches. I am modelling variation in location and time, but also...