AI - a Guide to Intelligent Systems.pdf - Member of EEPIS

348
KNOWLEDGE ENGINEERING AND DATA MINING
Figure 9.40
An aircraft trajectory and a data set built to train the ANFIS
matrix. Thus, the entire data set, which we use for training the ANFIS, is
represented by a 5255 matrix.
How many membership functions should we assign to each input variable?
A practical approach is to choose the smallest number of membership functions.
Thus, we may begin with two membership functions assigned to each input variable.
Figure 9.41 shows an actual aircraft trajectory and the ANFIS’s output after 1
and 100 epochs of training. As can be seen, even after 100 epochs, the ANFIS’s
Figure 9.41 Performance of the ANFIS with four inputs and two membership functions
assigned to each input: (a) one epoch; (b) 100 epochs