A feature not present among the input features, but assembled from one or more of them. Methods for creating synthetic features include the following: - Bucketing a continuous feature into range bins. - Creating a feature cross. - Multiplying (or dividing) one feature value by other feature value(s) or by itself. For example, if and are input features, then the following are examples of synthetic features: - ab - a^2^ - Applying a transcendental function to a feature value. For example, if is an input feature, then the following are examples of synthetic features: - sin(c) - ln(c) Features created by normalizing or scaling alone are not considered synthetic features.