How to see the firing strength using command line of a fuzzy System?

Hi, I have built a fuzzy system from scratch using the fuzzy logic toolbox. My FIS has a huge number of rules and I would like to see, after using the comand evalfis for a concrete example, which is the firing strength of each rule. The problems is that I can not figure out how to access to this information using command line.

Thak you for your help

Answer 1

[Sam Chak]

Hi @Luis M

The firing strengths can be obtained from the 5th output argument of the 'evalfis' command. Howevern note that this approach doesn't work when the fis is a fistree object.

fis         = readfis('tipper')

fis = 
  mamfis with properties:

                       Name: "tipper"
                  AndMethod: "min"
                   OrMethod: "max"
          ImplicationMethod: "min"
          AggregationMethod: "max"
      DefuzzificationMethod: "centroid"
    DisableStructuralChecks: 0
                     Inputs: [1x2 fisvar]
                    Outputs: [1x1 fisvar]
                      Rules: [1x3 fisrule]

	See 'getTunableSettings' method for parameter optimization.

Service_Val = 2;
Food_Val    = 1;
[output, fuzzifiedIn, ruleOut, aggregatedOut, ruleFiring] = evalfis(fis, [Service_Val Food_Val]);

disp(fuzzifiedIn)

    0.4111    1.0000
    0.1353    1.0000
    0.0000         0

disp(ruleFiring)

    1.0000
    0.1353
    0.0000

Alternative:

The firing strengths can be also be determined by manually performing the fuzzy operations on the fuzzified input values.

% Rule 1 firing strength
max(fuzzifiedIn(1,:))

ans = 1

% Rule 2 firing strength
min(fuzzifiedIn(2,:))

ans = 0.1353

% Rule 3 firing strength
max(fuzzifiedIn(3,:))

ans = 6.6584e-07

plotrule(fis, Inputs=[Service_Val Food_Val])