![3 ways to visualize prediction regions for classification problems Prediction regions for a classification problem with two outcomes. Graph created in SAS.](https://blogs.sas.com/content/iml/files/2017/07/predictionregion4-640x336.png)
An important problem in machine learning is the "classification problem." In this supervised learning problem, you build a statistical model that predicts a set of categorical outcomes (responses) based on a set of input features (explanatory variables). You do this by training the model on data for which the outcomes