Define a new input

To add a new input, use either the New Input option of the FIS menu, or a right mouse click in the Input area of the main window. The Input window appears.

An input is characterized by its range and its fuzzy partition. The fuzzy partition means the fuzzy sets that describe the input.

It can be active (default) or not.

Rename it Degree.

• The default input range is [0,1].
  To change it, select the Range menu in the Input Window, and enter the new range values: here 9 and 14.
• The easiest way to define a partition is the Regular Grid option of the MF menu, with the number of MFs corresponding to the number of wanted linguistic terms (default is 3 terms).

• The MFs are displayed in the lower half of the window : semi trapezoidal MFs at range bounds, and triangles elsewhere.
• For FIS clarity, MF names are important as they appear in the rules.

  We now give meaningful names and adjust the vertex location of each MF

  • MF 1 : name Low, vertices 9, 11,5 and 12
  • MF 2 : name Average, vertices 11,5, 12 and 12,5
  • MF 3 : name High, vertices 12, 12,5 and 14

  We obtain the partition given in figure 2.

Figure 2: Input definition in FisPro