Types of kernel functions

In SPSS Modeler, there are four different types of kernel functions:

• Linear: A simple function that works well with few nonlinear relationships
• Polynomial: A more complex function that works well with some nonlinear relationships
• RBF (Radial Basis Function): Similar to an RNN neural network that works well with nonlinear relationships
• Sigmoid: Similar to a two-layer neural network that works well with nonlinear relationships