jhplot.math.num.pdf
Class Geometric
- java.lang.Object
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- jhplot.math.num.pdf.DiscreteDistribution
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- jhplot.math.num.pdf.Geometric
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- All Implemented Interfaces:
- Distribution
public class Geometric extends DiscreteDistribution
The Geometric distribution.
References:
- Eric W. Weisstein. "Geometric Distribution." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Geometric.html
- Since:
- 1.2
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Constructor Summary
Constructors Constructor and Description Geometric()
Default constructor.Geometric(double p)
Create a distribution with the given probability of success.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description double
cumulativeProbability(int x)
The CDF for this distribution.double
getProbabilityOfSuccess()
Access probability of success.int
inverseCumulativeProbability(double p)
The inverse CDF for this distribution.double
probability(int x)
The PMF for this distribution.void
setProbabilityOfSuccess(double p)
Modify probability of success.
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Constructor Detail
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Geometric
public Geometric()
Default constructor. The probability of success is set to 0.5.
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Geometric
public Geometric(double p)
Create a distribution with the given probability of success.- Parameters:
p
- the probability of success.
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Method Detail
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cumulativeProbability
public double cumulativeProbability(int x) throws NumericException
The CDF for this distribution. This method returns P(X ≤ x).- Specified by:
cumulativeProbability
in classDiscreteDistribution
- Parameters:
x
- the value at which the CDF is evaluated.- Returns:
- CDF for this distribution.
- Throws:
NumericException
- if the cumulative probability can not be computed.
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getProbabilityOfSuccess
public double getProbabilityOfSuccess()
Access probability of success.- Returns:
- the probability of success.
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inverseCumulativeProbability
public int inverseCumulativeProbability(double p) throws NumericException
The inverse CDF for this distribution. This method returns the largest x such that, P(X ≤ x) ≤ p. The return value must also satisfy P(X ≥ x) &ge 1 - p.- Specified by:
inverseCumulativeProbability
in classDiscreteDistribution
- Parameters:
p
- the cumulative probability.- Returns:
- x
- Throws:
NumericException
- if the inverse cumulative probability can not be computed.
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probability
public double probability(int x)
The PMF for this distribution. This method returns P(X = x).- Specified by:
probability
in classDiscreteDistribution
- Parameters:
x
- the value at which the probability is evaluated.- Returns:
- PMF for this distribution.
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setProbabilityOfSuccess
public void setProbabilityOfSuccess(double p)
Modify probability of success.- Parameters:
p
- the new probability of success value.
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