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...l but for RMA regression, abline(lmodel2(x~y))does not do it. If somebody knows how to do it, it would be a great relief !! Best wishes, JL Jean-Louis Hemptinne PR Ecologie et Didactique de l'Ecologie Universit? de Toulouse - Ecole nationale de Formation agronomique UMR CNRS 5174 Evolution et Diversit? biologique BP 22687 F-31326 Castanet-Tolosan Cedex Tel : (+33)0561753295 Fax : (+33)0561750309

...;%d/%m/%y") it works! (idem with functions as.Date, as.yearmon, etc..) I already re-downloaded R but it still doesn't work. Has this bug been reported? How can I overcome this problem? Thank you very much for any help! Natalia Norden Natalia Norden PhD student Laboratoire Evolution et Diversit? Biologique Bat 4R3 Universit? Paul Sabatier Toulouse III 118, route de Narbonne, 31062 Toulouse Cedex 9

...but I do not know how to make the model selection. Since the AIC and log-likelihood are apparently meaningless, how can we select the parameters for a model and compare the models to find which one fits best the data? Thanks a lot Emmanuelle Tastard Emmanuelle TASTARD UMR 5174 'Evolution et Diversité Biologique' Université Paul Sabatier Bat 4R3 31062 TOULOUSE CEDEX 9 France tel : 05 61 55 67 59 [[alternative HTML version deleted]]

...bles), and when I validate the model with independent data, the new model is slightly more powerful (in the most part of cases). Thanks in advance, Guillem Chust ------------------------------------------------------------------ Guillem Chust chust at cict.fr Laboratoire Evolution et Diversit? Biologique, UMR 5174 CNRS/UPS UPS Toulouse III, batiment IVR3 118, route de Narbonne - 31062 Toulouse Cedex 4, France Tel 33 (0)5 61 55 67 58 Fax 33 (0)5 61 55 73 27 http://www.edb.ups-tlse.fr/