do you need to create a model matrix for gbm can gbm be used as a model do i need matrix in modeling which of the following is used to create a matrix in gbm what is gbm for model can gbm do categorical prediction what is model matrix and gbm what is gbm and model matrix what is the difference between gbm and model matrix why use gbm package what is the difference between gbm and model matrix what is gbm used for what is the difference between gbm and model matrix why use model matrix can I create model matrix in gbm how to create gbm model what is model matrix gbm vs models what is gbm model matrix do you need the matrix in a model