编码是机器学习流程里最容易被低估的环节之一，模型没办法直接处理文本形式的分类数据，尺寸（Small/Medium/Large）、颜色 ...

A decision tree regression system incorporates a set of if-then rules to predict a single numeric value. Decision tree regression is rarely used by itself because it overfits the training data, and so ...