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java.lang.Object net.sf.doodleproject.numerics4j.statistics.distribution.DiscreteDistribution
public abstract class DiscreteDistribution
Base discrete distribution.
Constructor Summary | |
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DiscreteDistribution()
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Method Summary | |
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abstract double |
cumulativeProbability(int x)
The CDF for this distribution. |
protected int |
findInverseCumulativeProbability(double p,
int lower,
int initial,
int upper)
Generic means to compute inverse cumulative probability values. |
abstract int |
inverseCumulativeProbability(double p)
The inverse CDF for this distribution. |
abstract double |
probability(int x)
The PMF for this distribution. |
protected double |
simpleCumulativeProbability(int x0,
int x1)
Generic means to compute cumulative probability values. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public DiscreteDistribution()
Method Detail |
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public abstract double cumulativeProbability(int x) throws NumericException
x
- the value at which the CDF is evaluated.
NumericException
- if the cumulative probability can not be
computed.protected double simpleCumulativeProbability(int x0, int x1) throws NumericException
x0
- the lower bound of summation.x1
- the upper bound of summation.
NumericException
- if the cumulative probability can not be
computed.protected int findInverseCumulativeProbability(double p, int lower, int initial, int upper) throws NumericException
p
- the cumulative probability.lower
- the global lower bound of the inverse CDF value.initial
- an initial guess at the inverse CDF value.upper
- the global upper bound of the inverse CDF value.
NumericException
- if the inverse cumulative probability can not be
computed.public abstract int inverseCumulativeProbability(double p) throws NumericException
p
- the cumulative probability.
NumericException
- if the inverse cumulative probability can not be
computed.public abstract double probability(int x) throws NumericException
x
- the value at which the probability is evaluated.
NumericException
- if the probability can not be computed.
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