removeInput

Remove input variable from fuzzy inference system

Syntax

fisOut = removeInput(fisIn,inputName)

Description

fisOut = removeInput(fisIn,inputName) removes the input variable with the name inputName from fuzzy inference system fisIn and returns the resulting fuzzy system in fisOut.

Examples

Remove Input Variable from Fuzzy Inference System

Load fuzzy system.

fis = readfis("tipper");

View the input variables of fis.

fis.Inputs

ans = 
  1x2 fisvar array with properties:

    Name
    Range
    MembershipFunctions

  Details:
           Name        Range     MembershipFunctions
         _________    _______    ___________________

    1    "service"    0    10        {1x3 fismf}    
    2    "food"       0    10        {1x2 fismf}    

View the rules of fis.

fis.Rules

ans = 
  1x3 fisrule array with properties:

    Description
    Antecedent
    Consequent
    Weight
    Connection

  Details:
                                Description                        
         __________________________________________________________

    1    "service==poor | food==rancid => tip=cheap (1)"           
    2    "service==good => tip=average (1)"                        
    3    "service==excellent | food==delicious => tip=generous (1)"

Remove the service input variable.

fis = removeInput(fis,"service");

View the updated input variables.

fis.Inputs

ans = 
  fisvar with properties:

                   Name: "food"
                  Range: [0 10]
    MembershipFunctions: [1x2 fismf]

View the updated rules.

fis.Rules

ans = 
  1x2 fisrule array with properties:

    Description
    Antecedent
    Consequent
    Weight
    Connection

  Details:
                      Description             
         _____________________________________

    1    "food==rancid => tip=cheap (1)"      
    2    "food==delicious => tip=generous (1)"

service has been removed from the variables and rules of fis.

Input Arguments

fisIn — Fuzzy inference system

mamfis object | sugfis object | mamfistype2 object | sugfistype2 object

Fuzzy inference system, specified as one of the following:

• mamfis object — Mamdani fuzzy inference system

• sugfis object — Sugeno fuzzy inference system

• mamfistype2 object — Type-2 Mamdani fuzzy inference system

• sugfistype2 object — Type-2 Sugeno fuzzy inference system

inputName — Input variable name

string | character vector

Input variable name, specified as a string or character vector.

Output Arguments

fisOut — Updated fuzzy inference system

mamfis object | sugfis object | mamfistype2 object | sugfistype2 object

Updated fuzzy inference system, returned as one of the following objects.

• mamfis object — Mamdani fuzzy inference system

• sugfis object — Sugeno fuzzy inference system

• mamfistype2 object — Type-2 Mamdani fuzzy inference system

• sugfistype2 object — Type-2 Sugeno fuzzy inference system

fisOut has the same properties as fisIn except:

• The input variable with the specified name is removed.

• The specified input variable is removed from any fuzzy rules. If a rule has only the specified input variable in its antecedent, then the entire rule is removed. If a rule has more than one input variable in its antecedent, then the specified input variable is removed from the antecedent.

Version History

Introduced in R2018b

R2018b: Replaces rmvar

This function replaces rmvar for removing input variables from a fuzzy inference system.