jhplot.math.num.pdf
Class Logistic
- java.lang.Object
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- jhplot.math.num.pdf.ContinuousDistribution
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- jhplot.math.num.pdf.Logistic
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- All Implemented Interfaces:
- Distribution
public class Logistic extends ContinuousDistribution
The Logistic distribution.
References:
- Eric W. Weisstein. "Logistic Distribution." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Logistic.html
- Since:
- 1.2
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Constructor Summary
Constructors Constructor and Description Logistic()
Default constructor.Logistic(double m, double s)
Create a distribution with the given mean and scale parameters.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description double
cumulativeProbability(double x)
The CDF for this distribution.double
getMean()
Access the mean.double
getScale()
Access the scale parameter.double
inverseCumulativeProbability(double p)
The inverse CDF for this distribution.void
setMean(double m)
Modify the mean.void
setScale(double s)
Modify the scale parameter.
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Constructor Detail
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Logistic
public Logistic()
Default constructor. The mean is set to zero and the scale parameter is set to one.
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Logistic
public Logistic(double m, double s)
Create a distribution with the given mean and scale parameters.- Parameters:
m
- the mean.s
- the scale parameter.
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Method Detail
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cumulativeProbability
public double cumulativeProbability(double x)
The CDF for this distribution. This method returns P(X < x).- Specified by:
cumulativeProbability
in classContinuousDistribution
- Parameters:
x
- the value at which the CDF is evaluated.- Returns:
- CDF for this distribution.
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getMean
public double getMean()
Access the mean.- Returns:
- the mean.
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getScale
public double getScale()
Access the scale parameter.- Returns:
- the scale parameter.
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inverseCumulativeProbability
public double inverseCumulativeProbability(double p)
The inverse CDF for this distribution. This method returns x such that, P(X < x) = p.- Specified by:
inverseCumulativeProbability
in classContinuousDistribution
- Parameters:
p
- the cumulative probability.- Returns:
- x
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setMean
public void setMean(double m)
Modify the mean.- Parameters:
m
- The new mean value.
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setScale
public void setScale(double s)
Modify the scale parameter.- Parameters:
s
- The new scale parameter value.
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