MATLAB: Does MATLAB crash when the weight of a rule for the EVALIFIS function from the Fuzzy Logic Toolbox is empty

evalfisfuzzyFuzzy Logic Toolboxlogicreadfissegmentationshowfistoolboxviolation

Instead of receiving a segmentation violation, I would like to see a more intuitive error generated.

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This enhancement has been incorporated in Release 14 Service Pack 3 (R14SP3). For previous product releases, read below for any possible workarounds:

There is a bug in MATLAB 6.5 (R13) in the way that MATLAB crashes when the weight of a rule for the EVALIFIS function from the Fuzzy Logic Toolbox is empty.

As a workaround, to prevent such segmentation violation, try applying SHOWFIS function to a FIS structure first. If no error occurs, use the EVALFIS function to perform fuzzy inference calculations.

Related Solutions

MATLAB: Is the Fuzzy Logix Toolbox 2.1.2 (R13) giving me the wrong methods for a Sugeno system

This bug has been fixed in Release 14 Service Pack 2 (R14SP2). For previous releases, read below for any possible workarounds:

There is a bug in the Fuzzy Logic Toolbox 2.1.2 (R13). You can use the following code to work around this problem:

a = readfis('tippersg');
a.impMethod = 'prod';
a.aggMethod = 'sum';

Then you can import 'a' into your FIS editor.

NOTE: The implication and aggregation methods still show 'min' and 'max' in the editor. This will be resolved in a future fix. For now, by setting the methods from the command line, you can properly set the Sugeno system. What the editor shows is not what the system really uses, as you will see by playing with the editor.

MATLAB: Does the EVALFIS function give an error when implementing the example in the “anfis from the Command Line” section of the documentation for Fuzzy Logic Toolbox 2.2 (R14SP1)

This change has been incorporated into the documentation in Release 14 Service Pack 3 (R14SP3). For previous releases, read below for any additional information:

This has been verified as an error in the documentation for Fuzzy Logic Toolbox 2.2 (R14SP1) within the "anfis from the Command Line" tutorial. The EVALFIS command in this documentation should read as follows:

anfis_output = evalfis([trnData(:,1:4); chkData(:,1:4)], fismat2);

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Related Solutions

MATLAB: Is the Fuzzy Logix Toolbox 2.1.2 (R13) giving me the wrong methods for a Sugeno system

MATLAB: Does the EVALFIS function give an error when implementing the example in the “anfis from the Command Line” section of the documentation for Fuzzy Logic Toolbox 2.2 (R14SP1)

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