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java.lang.Objectorg.apache.mahout.math.function.DoubleFunction
org.apache.mahout.math.jet.random.AbstractDistribution
org.apache.mahout.math.jet.random.AbstractContinousDistribution
org.apache.mahout.math.jet.random.Normal
public class Normal
Implements a normal distribution specified mean and standard deviation.
| Constructor Summary | |
|---|---|
Normal(double mean,
double standardDeviation,
Random randomGenerator)
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| Method Summary | |
|---|---|
double |
cdf(double x)
Returns the cumulative distribution function. |
double |
nextDouble()
Returns a random number from the distribution. |
double |
pdf(double x)
Returns the probability density function. |
void |
setRandomGenerator(Random randomGenerator)
Sets the uniform random generator internally used. |
void |
setState(double mean,
double standardDeviation)
Sets the mean and variance. |
String |
toString()
Returns a String representation of the receiver. |
| Methods inherited from class org.apache.mahout.math.jet.random.AbstractContinousDistribution |
|---|
nextInt |
| Methods inherited from class org.apache.mahout.math.jet.random.AbstractDistribution |
|---|
apply, apply, getRandomGenerator, randomDouble |
| Methods inherited from class org.apache.mahout.math.function.DoubleFunction |
|---|
isDensifying |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public Normal(double mean,
double standardDeviation,
Random randomGenerator)
mean - The mean of the resulting distribution.standardDeviation - The standard deviation of the distribution.randomGenerator - The random number generator to use. This can be null if you don't
need to generate any numbers.| Method Detail |
|---|
public double cdf(double x)
cdf in class AbstractContinousDistributionpublic double pdf(double x)
pdf in class AbstractContinousDistributionpublic double nextDouble()
nextDouble in class AbstractDistributionpublic final void setRandomGenerator(Random randomGenerator)
setRandomGenerator in class AbstractDistributionrandomGenerator - the new PRNG
public final void setState(double mean,
double standardDeviation)
mean - The new value for the mean.standardDeviation - The new value for the standard deviation.public String toString()
toString in class Object
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