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java.lang.Objecthep.aida.ref.event.AIDAObservable
hep.aida.ref.ManagedObject
hep.aida.ref.function.AbstractIFunction
jhplot.fit.Landau
public class Landau
The function represents the Landau distribution. This class represents a Landau distribution, as approximated by the Moyal formula \[ Moyal(\lambda) = \frac{\exp{-0.5(\lambda+\exp{-\lambda})}}{\sqrt{2\pi}} \] See J.E. Moyal, Theory of ionization fluctuations, Phil. Mag. 46 (1955) 263. Note that this analytical approximation is too low in the tail. In order to allow for a fit, we define \[ \lambda = \frac{x - m}{s} \] with x the dataset variable. From Goddard GLAST ACD team (Fortran version)
Constructor Summary | |
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Landau()
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Landau(java.lang.String title)
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Landau(java.lang.String[] variableNames,
java.lang.String[] parameterNames)
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Method Summary | |
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double |
value(double[] v)
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Methods inherited from class hep.aida.ref.function.AbstractIFunction |
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addFunctionListener, annotation, clone, codeletString, dimension, excludeNormalizationAll, gradient, includeNormalizationAll, indexOfParameter, isEqual, isNormalized, normalizationParameter, normalizationRange, normalize, numberOfParameters, parameter, parameterGradient, parameterNames, parameters, providesGradient, providesNormalization, providesParameterGradient, removeFunctionListener, setCodeletString, setParameter, setParameters, setTitle, title, variableName, variableNames |
Methods inherited from class hep.aida.ref.ManagedObject |
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isFillable, name, setFillable, setName, type, typeForClass |
Methods inherited from class hep.aida.ref.event.AIDAObservable |
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addListener, isConnected, removeAllListeners, removeListener, setConnected, setValid, setValidForAll |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface hep.aida.ref.event.Connectable |
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isConnected, setConnected |
Constructor Detail |
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public Landau()
public Landau(java.lang.String title)
public Landau(java.lang.String[] variableNames, java.lang.String[] parameterNames)
Method Detail |
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public double value(double[] v)
value
in interface hep.aida.IFunction
value
in class hep.aida.ref.function.AbstractIFunction
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