Dear List, I´m working on a classification problem. My response has 60 levels. I`m very interested in boosted trees like AdaBoost or gradient boosting machine as implemented in the package "gbm". Unfortunately gbm is only applicable for 2-class problems. Is anybody out there who can help me? Is there a way to use gbm() for multi-class problems? Maybe there is a way to transform my dataset in 60 datasets with binary response to make a one-against-all classification but I didn`t find anything on the R-project homepage or in Google. Thanks for every help. TIM ----------------------------------------------------------------------------------- Tim Häring Bavarian State Institute of Forest Research Department of Forest Ecology Am Hochanger 11 D-85354 Freising E-Mail: tim.haering@lwf.bayern.de http://www.lwf.bayern.de [[alternative HTML version deleted]]