search for: bsttree

...max_depth = 6:8, min_child_weight = c(2, 2.25, 2.5), colsample_bytree = (3:5)/10, gamma = 0, subsample = 1) That approach also worked with my data. By making the corresponding adjustments, I was also successful with gbm, bstTree and extraTree models but I can't get it to work with bartMachine models. I get dozens of messages like these: bartMachine initializing with 50 trees... bartMachine vars checked... bartMachine java init... bartMachine factors created... bartMachine before preprocess... bartMachine after preproc...