Tree-Based Regression Models
In the preceding activity, you were able to identify the three most important features that could be used to predict customer spend. Now, imagine doing the same by removing each feature one at a time and finding out the RMSE. RFE aims to remove the redundant task of going over each feature by doing it internally, without forcing the user to put in the effort to do it manually.
So far, we have covered linear regression models. Now it's time to take it up a notch by discussing some tree-based regression models.
Linear models are not the only type of regression models. Another powerful technique is the use of regression trees. Regression trees are based on the idea of a decision tree. A decision tree is a bit like a flowchart, where, at each step, you ask whether a variable is greater than or less than some value. After flowing through several of these steps, you reach the end of the tree and receive an answer for what value the prediction should be...
