-
Visualising confidence in multi-class classification problems
It is best practise to visualise the confidence of predictive models whenever possible. With binary classification in two dimensions this is particularly straightforward since confidence that is lost from one class is necessarily gained by the other. With more classes the visualisation becomes less straightforward: confidence can be lost to any combination of classes and to each at different rates. Voronoi diagrams are a popular way of displaying multi-class predictions, but unfortunately these do not directly show predictive confidence. In this post I briefly describe and give code for a method that embeds multi-class confidence in predictive diagrams.