How to Develop a Random Forest Ensemble in Python - MachineLearningMastery.com How to Develop a Random Forest Ensemble in Python - MachineLearningMastery.com

The effect is that the predictions, and in turn, prediction errors, made by each tree in the ensemble are more different or less correlated. When the predictions from these less correlated trees are averaged to make a prediction, it often results in better performance than bagged decision trees. Perhaps the most important hyperparameter to tune for the random forest is the number of random features to consider at each split point. Random forests' tuning parameter is the number of randomly selected predictors, k, to choose from at each split, and is commonly referred to as mtry. In the regression context, Breiman (2001) recommends setting mtry to be one-third of the number of predictors.