defuzz
Defuzzify membership function
Description
Examples
Obtain Defuzzified Value
x = -10:0.1:10;
mf = trapmf(x,[-10 -8 -4 7]);
out = defuzz(x,mf,'centroid')
out = -3.2857
Input Arguments
x
— Variable values
vector
Variable values,
mf
— Membership function values
vector
Membership function values, specified as a vector with the same length as
x
. Each element of mf
contains a fuzzy
membership value for the corresponding variable value in x
.
method
— Defuzzification method
'centroid'
| 'bisector'
| 'mom'
| 'lom'
| 'som'
| character vector | string
Defuzzification method, specified as one of the following:
'centroid'
— Centroid of the area under the output fuzzy set'bisector'
— Bisector of the area under the output fuzzy set'mom'
— Mean of the values for which the output fuzzy set is maximum'lom'
— Largest value for which the output fuzzy set is maximum'som'
— Smallest value for which the output fuzzy set is maximumCharacter vector or string that contains the name of a custom function in the current working folder or on the MATLAB® path
For more information on:
The built-in defuzzification methods, see Defuzzification Methods.
Custom defuzzification methods, see Build Fuzzy Systems Using Custom Functions
Output Arguments
output
— Defuzzified output value
scalar
Defuzzified output value, returned as a scalar.
Version History
Introduced before R2006a
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