net.sourceforge.jFuzzyLogic.membership
Class MembershipFunctionSigmoidal

java.lang.Object
  net.sourceforge.jFuzzyLogic.membership.MembershipFunction
      net.sourceforge.jFuzzyLogic.membership.MembershipFunctionContinuous
          net.sourceforge.jFuzzyLogic.membership.MembershipFunctionSigmoidal

public class MembershipFunctionSigmoidal
extends MembershipFunctionContinuous

Sigmoidal membership function

Author:

pcingola@users.sourceforge.net

Field Summary

Fields inherited from class net.sourceforge.jFuzzyLogic.membership.MembershipFunction

discrete, parameters, universeMax, universeMin

Constructor Summary

MembershipFunctionSigmoidal(double gain, double t0)
Constructor

Method Summary

boolean	checkParamters(java.lang.StringBuffer errors)
void	estimateUniverse() Try to guess the universe (if not setted)
double	membership(double in) Get membership function's value.
java.lang.String	toString()
java.lang.String	toStringFCL() FCL representation

Methods inherited from class net.sourceforge.jFuzzyLogic.membership.MembershipFunctionContinuous

chart

Methods inherited from class net.sourceforge.jFuzzyLogic.membership.MembershipFunction

getName, getParameter, getParametersLength, getUniverseMax, getUniverseMin, isDiscrete, setDiscrete, setParameter, setUniverseMax, setUniverseMin

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MembershipFunctionSigmoidal

public MembershipFunctionSigmoidal(double gain,
                                   double t0)

Constructor

Parameters:

gain - : Mean

t0 - : Standardt deviation

Method Detail

checkParamters

public boolean checkParamters(java.lang.StringBuffer errors)

Specified by:

checkParamters in class MembershipFunction

estimateUniverse

public void estimateUniverse()

Description copied from class: MembershipFunction

Try to guess the universe (if not setted)

Specified by:

estimateUniverse in class MembershipFunction

membership

public double membership(double in)

Description copied from class: MembershipFunction

Get membership function's value.

Specified by:

membership in class MembershipFunction

Parameters:

in - : Variable's 'x' value Note: Output mu be in range [0,1]

See Also:

MembershipFunction.membership(double)

toString

public java.lang.String toString()

Overrides:

toString in class MembershipFunction

See Also:

Object.toString()

toStringFCL

public java.lang.String toStringFCL()

FCL representation

Specified by:

toStringFCL in class MembershipFunction