public final class GammaDistribution extends ProbabilityDistribution
Constructor and Description |
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GammaDistribution(double s)
Constructs a gamma distribution.
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Modifier and Type | Method and Description |
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double |
cumulative(double X)
Cumulative gamma distribution function.
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double |
getMean()
Returns the mean.
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double |
getShapeParameter()
Returns the shape parameter.
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double |
getVariance()
Returns the variance.
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double |
inverse(double probability)
Inverse of the cumulative gamma distribution function.
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double |
probability(double X)
Probability density function of a gamma distribution.
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checkRange, checkRange, findRoot
public GammaDistribution(double s)
s
- the shape parameter.public double getShapeParameter()
public double getMean()
public double getVariance()
public double probability(double X)
probability
in class ProbabilityDistribution
public double cumulative(double X)
cumulative
in class ProbabilityDistribution
public double inverse(double probability)
inverse
in class ProbabilityDistribution