Fuzzy Logic Toolbox

rmvar

To remove variables from an FIS.

Synopsis

[fis2,errorStr] = rmvar(fis,'varType',varIndex) 
fis2 = rmvar(fis,'varType',varIndex)

Description

fis2 = rmvar(fis,'varType',varIndex) removes the variable 'varType', of index varIndex, from the fuzzy inference system associated with the workspace FIS structure, fis:

• The string varType must be 'input' or 'output'.
• varIndex is an integer for the index of the variable. This index represents the order in which the variables are listed.

[fis2,errorStr] = rmvar(fis,'varType',varIndex) returns any error messages to the string, errorStr.

This command automatically alters the rule list to keep its size consistent with the current number of variables. You must delete from the FIS any rule that contains a variable you want to remove, before removing it. You cannot remove a fuzzy variable currently in use in the rule list.

Examples

a = newfis('mysys');
a = addvar(a,'input','temperature',[0 100]);
getfis(a)

returns

    Name = mysys
      Type      = mamdani
      NumInputs = 1
      InLabels  = 
            temperature
      NumOutputs = 0
      OutLabels = 
      NumRules = 0
      AndMethod = min
      OrMethod = max
      ImpMethod = min
      AggMethod = max
      DefuzzMethod = centroid
ans =
mysys
b = rmvar(a,'input',1);
getfis(b)

returns

        Name = mysys
        Type = mamdani
        NumInputs = 0
        InLabels =
        NumOutputs = 0
        OutLabels =
        NumRules = 0
      AndMethod = min
      OrMethod = max
      ImpMethod = min
      AggMethod = max
      DefuzzMethod = centroid
ans =
mysys

See Also

addmf, addrule, addvar, rmmf

rmmf

ruleedit