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...eeded to "compare" them. The larger AUC is the higher correlation of 2 variables compared. No other measures or calculations are needed. Jarek Tuszynski -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Laurent Fanchon Sent: Wednesday, March 15, 2006 11:57 AM To: r-help at stat.math.ethz.ch Subject: [R] How to compare areas under ROC curves calculated with ROCR package Dear all, I try to compare the performances of several parameters to diagnose lameness in dogs. I have several ROC curves from the same dataset...

...these questions are very simple and I am just missing something, suggestions about good texts or examples on R would be great. I am generating data with Scilab, I have a single matrix corresponding to each dog. But I can change it if needed. Any help would be greatly appreciated Thanks Laurent Fanchon DVM, MS Ecole Nationale Veterinaire d'Alfort France

...a } The author of this script says: "The first function (seROC) calculate the standard error of ROC curve, the second function (cROC) compare ROC curves." What do you think of this script? Is there any function to do it better in ROCR? Any help would be greatly appreciated. Laurent Fanchon DVM, MS Ecole Nationale V?t?rinaire d'Alfort FRANCE

...the order of the Limb factor (Right<Left) I will get the same results with LimbLeft. How to determine the limb with the highest variance? Do I have to refer to the first two models (Variance attributable to Day was a little higher for the Right) ? Any help will be very appreciated, Laurent Fanchon Ecole Nationale V?t?rinaire d'Alfort National Vet School of Alfort (France)

...n Center Drive M/S 24-2-C Thousand Oaks CA 93021 (805) 447 - 7431 "Today has the fatigue of a Friday and the desperation of a Monday" -- S. Pearce 2005 -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Laurent Fanchon Sent: Wednesday, May 11, 2005 9:56 AM To: r-help at stat.math.ethz.ch Subject: [R] lme How to validate a model with a validation set and a test set Dear all, I am still trying to fit a model for habituation with lme (Dogs are trotting on a treadmill once a week during 4 consecutive weeks). I ha...

Dear all, I am looking at habituation of dogs trotting on a treadmill. Each record is made of 40 to 50 data for the same variable (for example Peak). I get each record at several minutes (1, 2 and 4) for each session. And I have 4 sessions of training (one session a week). The aim is to study the effect of the factor (Minute) on the Peak variable, and to study the changes of this effect