Supervised vs. unsupervised

means the distinction whether your training data is annotated (or labeled) with respect to your task. An example: If you want to build a machine learner for human age estimation based on speech, you might give an algorithm a lot of examples of human speech annotated with the age of the person. This would be your training data and the approach would be supervised (by the age annotations). With unsupervised learning, you would give an algorithm simply a lot of human speech data and might ask it to cluster the data, based on differences. And might hope that the resulting clusters coincide with age.

Nkululeko exercise

-> Nkululeko: install the Berlin Emodb

This database contains examples of labels:

• emotion and gender labels as categorical data, for classification
• age labels as numerical data, for regression