A confusion matrix is a handy approach to current the kinds of errors a machine studying mode makes. It’s an N by N grid with numbers, the place the worth within the [n, m] cell represents the variety of examples annotated with the n-th class acknowledged because the m-th class. On this tutorial, I’ll give attention to making a confusion matrix and a heatmap. The colour palette can be used to show the sizes of various teams, making it straightforward to note similarities or important variations in group sizes. This sort of visualization is useful once you cope with quite a few classes.
Here’s a visible rationalization of the weather of the confusion matrix.