A group of sheep on Faroe Islands. Photo by Dylan Shaw. I’m happy to announce that stackgbm, a minimalist R package for tree model stacking, is now on CRAN. Model stacking is an ensemble learning method that combines the predictions from multiple base learners to improve overall performance. stackgbm makes it easy to stack gradient boosting decision tree (GBDT) models, which are particularly effective for classification tasks. You can install stackgbm …