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6 results for “from:Jean-Baptiste Ferdy”

how to initialize corStruct with a distance matrix
Jean-Baptiste Ferdy · Aug 26, 2011 · r-sig-geo

Dear R-users, I'd like to use a corStruct matrix in fitting a binomial model, but I need to define it using a pre-calculated distance matrix (instead of feeding it with spatial coordinates). Do you have any idea...

analyzing binomial data with spatially correlated errors
Jean-Baptiste Ferdy · Mar 19, 2008 · r-help

Dear R users, I want to explain binomial data by a serie of fixed effects. My problem is that my binomial data are spatially correlated. Naively, I thought I could found something similar to gls to analyze such data. After...

glmmPQL
Jean-Baptiste Ferdy · Oct 10, 2008 · r-help

Dear all, I am experiencing problems with glmmmPQL. I am trying to analyze binomial data with some spatial autocorrelation. Here is my code and some of the outputs > colnames(d.glmm) [1] "BV" "Longitude" "Latitude" "nb_pc_02" "nb_expr...

degrees of freedom in lme
Jean-Baptiste Ferdy · Jun 26, 2007 · r-help

>> This is such a common question that it has a an "FAQ-like" response from Doug Bates. Google "lmer p-values and all that" to find the response. >Isn't this a different question, though, since Jean-Baptiste is using...

extracting residual variance from glmmPQL
Jean-Baptiste Ferdy · Oct 18, 2008 · r-help

Dear all, I am trying to simulate data sets from a model fitted with glmmPQL, in order to compute the distribution of a summary statistics. My data are binomial and I have a correlation term in my model. My model...

degrees of freedom in lme
Jean-Baptiste Ferdy · Jun 25, 2007 · r-help

Dear all, I am starting to use the lme package (and plan to teach a course based on it next semester...). To understand what lme is doing precisely, I used balanced datasets described in Pinheiro and Bates and tried to...

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