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java.lang.Objectorg.apache.commons.math.distribution.AbstractDistribution
org.apache.commons.math.distribution.AbstractIntegerDistribution
org.apache.commons.math.distribution.BinomialDistributionImpl
public class BinomialDistributionImpl
The default implementation of BinomialDistribution.
| Constructor Summary | |
|---|---|
BinomialDistributionImpl(int trials,
double p)
Create a binomial distribution with the given number of trials and probability of success. |
|
| Method Summary | |
|---|---|
double |
cumulativeProbability(int x)
For this distribution, X, this method returns P(X ≤ x). |
protected int |
getDomainLowerBound(double p)
Access the domain value lower bound, based on p, used to
bracket a PDF root. |
protected int |
getDomainUpperBound(double p)
Access the domain value upper bound, based on p, used to
bracket a PDF root. |
int |
getNumberOfTrials()
Access the number of trials for this distribution. |
double |
getProbabilityOfSuccess()
Access the probability of success for this distribution. |
int |
inverseCumulativeProbability(double p)
For this distribution, X, this method returns the largest x, such that P(X ≤ x) ≤ p. |
double |
probability(int x)
For this distribution, X, this method returns P(X = x). |
void |
setNumberOfTrials(int trials)
Deprecated. as of 2.1 (class will become immutable in 3.0) |
void |
setProbabilityOfSuccess(double p)
Deprecated. as of 2.1 (class will become immutable in 3.0) |
| Methods inherited from class org.apache.commons.math.distribution.AbstractIntegerDistribution |
|---|
cumulativeProbability, cumulativeProbability, cumulativeProbability, probability |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface org.apache.commons.math.distribution.IntegerDistribution |
|---|
cumulativeProbability |
| Methods inherited from interface org.apache.commons.math.distribution.DiscreteDistribution |
|---|
probability |
| Methods inherited from interface org.apache.commons.math.distribution.Distribution |
|---|
cumulativeProbability, cumulativeProbability |
| Constructor Detail |
|---|
public BinomialDistributionImpl(int trials,
double p)
trials - the number of trials.p - the probability of success.| Method Detail |
|---|
public int getNumberOfTrials()
getNumberOfTrials in interface BinomialDistributionpublic double getProbabilityOfSuccess()
getProbabilityOfSuccess in interface BinomialDistribution@Deprecated public void setNumberOfTrials(int trials)
setNumberOfTrials in interface BinomialDistributiontrials - the new number of trials.
IllegalArgumentException - if trials is not a valid
number of trials.@Deprecated public void setProbabilityOfSuccess(double p)
setProbabilityOfSuccess in interface BinomialDistributionp - the new probability of success.
IllegalArgumentException - if p is not a valid
probability.protected int getDomainLowerBound(double p)
p, used to
bracket a PDF root.
getDomainLowerBound in class AbstractIntegerDistributionp - the desired probability for the critical value
pprotected int getDomainUpperBound(double p)
p, used to
bracket a PDF root.
getDomainUpperBound in class AbstractIntegerDistributionp - the desired probability for the critical value
p
public double cumulativeProbability(int x)
throws MathException
cumulativeProbability in interface IntegerDistributioncumulativeProbability in class AbstractIntegerDistributionx - the value at which the PDF is evaluated.
MathException - if the cumulative probability can not be computed
due to convergence or other numerical errors.public double probability(int x)
probability in interface IntegerDistributionx - the value at which the PMF is evaluated.
public int inverseCumulativeProbability(double p)
throws MathException
p.
Returns -1 for p=0 and Integer.MAX_VALUE for
p=1.
inverseCumulativeProbability in interface IntegerDistributioninverseCumulativeProbability in class AbstractIntegerDistributionp - the desired probability
MathException - if the inverse cumulative probability can not be
computed due to convergence or other numerical errors.
IllegalArgumentException - if p < 0 or p > 1
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