10.4 LEARNING ALGORITHMS 411
Neural networks
MultilayerPerceptronis a neural network that trains using backpropagation
(Section 6.3, page 227). Although listed under functions in Table 10.5, it differs
from the other schemes because it has its own user interface. If you load up the
numeric version of the weather data, invoke MultilayerPerceptron,set GUIto
Tr u ein its object editor, and run the network by clicking Starton the Classify
panel, the diagram in Figure 10.20 appears in a separate window. This network
has three layers: an input layer on the left with one rectangular box for each
(a)
(b)
Figure 10.20Using Weka’s neural-network graphical user interface.