[SerializableAttribute]
public class ExponentialDistribution : ContinuousDistribution

<SerializableAttribute>
Public Class ExponentialDistribution
	Inherits ContinuousDistribution

[SerializableAttribute]
public ref class ExponentialDistribution : public ContinuousDistribution

[<SerializableAttribute>]
type ExponentialDistribution =  
    class
        inherit ContinuousDistribution
    end

The ExponentialDistribution type exposes the following members.

	Name	Description
	ExponentialDistribution(Double)	Constructs a new ExponentialDistribution.
	ExponentialDistribution(NumericalVariable)	Estimates the parameters of the distribution of a variable assuming it follows an exponential distribution.
	ExponentialDistribution(VectorDouble)	Estimates the parameters of the distribution of a variable assuming it follows an exponential distribution.

	Name	Description
	InterQuartileRange	Returns the inter-quartile range of this distribution. (Inherited from ContinuousDistribution.)
	IsSymmetrical	Gets whether the distribution is known to be symmetrical around the mean. (Inherited from ContinuousDistribution.)
	Kurtosis	Gets the kurtosis of the distribution. (Overrides DistributionKurtosis.)
	Mean	Gets the mean or expectation value of the distribution. (Overrides DistributionMean.)
	ScaleParameter	Gets the scale parameter of the distribution.
	Skewness	Gets the skewness of the distribution. (Overrides DistributionSkewness.)
	StandardDeviation	Gets the standard deviation of the distribution. (Inherited from Distribution.)
	StatisticSymbol	Gets the common symbol to describe a statistic from the distribution. (Inherited from Distribution.)
	Support	Gets the support of the distribution. (Overrides ContinuousDistributionSupport.)
	Variance	Gets the variance of the distribution. (Overrides DistributionVariance.)

	Name	Description
	DistributionFunction	Evaluates the cumulative distribution function (CDF) of this distribution for the specified value. (Overrides ContinuousDistributionDistributionFunction(Double).)
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetExpectationValue(FuncDouble, Double)	Returns the expectation value of a function. (Inherited from ContinuousDistribution.)
	GetExpectationValue(FuncDouble, Double, Double, Double)	Returns the un-normalized expectation value of a function over the specified interval. (Inherited from ContinuousDistribution.)
	GetExpectedHistogram(Double, Double)	Gets a vector containing a histogram of the expected number of samples for a given total number of samples. (Inherited from ContinuousDistribution.)
	GetExpectedHistogram(IntervalIndexDouble, Double)	Gets a vector containing a histogram of the expected number of samples for a given total number of samples. (Inherited from ContinuousDistribution.)
	GetExpectedHistogram(Double, Double, Int32, Double)	Gets a vector whose bins contain the expected number of samples for a given total number of samples. (Inherited from ContinuousDistribution.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetRandomSequence	Returns a sequence of random samples from the distribution. (Inherited from ContinuousDistribution.)
	GetRandomSequence(Random)	Returns a sequence of random samples from the distribution. (Inherited from ContinuousDistribution.)
	GetRandomSequence(Random, Int32)	Returns a sequence of random samples of the specified length from the distribution. (Inherited from ContinuousDistribution.)
	GetRandomVariate(Random)	Obsolete. Returns a random sample from the distribution. (Inherited from ContinuousDistribution.)
	GetRandomVariate(Random, Double)	Obsolete. Returns a single random sample from an exponential distribution with the specified scale parameter..
	GetRandomVariates(Random, Vector)	Obsolete. Fills a vector with random numbers. (Inherited from ContinuousDistribution.)
	GetRandomVariates(Random, Double)	Obsolete. Fills a Double array with random numbers. (Inherited from ContinuousDistribution.)
	GetRandomVariates(Random, Vector, Int32, Int32)	Obsolete. Fills a Double array with random numbers. (Inherited from ContinuousDistribution.)
	GetRandomVariates(Random, Double, Int32, Int32)	Obsolete. Fills a Double array with random numbers. (Inherited from ContinuousDistribution.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	HazardFunction	Returns the probability of failure at the specified value. (Inherited from ContinuousDistribution.)
	InverseDistributionFunction	Returns the sample value at the specified percentile. (Overrides ContinuousDistributionInverseDistributionFunction(Double).)
	LeftTailProbability	Returns the probability that a sample from the distribution is less than the specified value. (Inherited from ContinuousDistribution.)
	LogProbabilityDensityFunction	Returns the logarithm of the probability density function (PDF) of this distribution for the specified value. (Overrides ContinuousDistributionLogProbabilityDensityFunction(Double).)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	MomentFunction	Returns the value of the moment function of the specified order. (Overrides ContinuousDistributionMomentFunction(Int32, Double).)
	Probability	Returns the probability that a sample taken from the distribution lies inside the specified interval. (Inherited from ContinuousDistribution.)
	ProbabilityDensityFunction	Returns the value of the probability density function (PDF) of this distribution for the specified value. (Overrides ContinuousDistributionProbabilityDensityFunction(Double).)
	RightTailProbability	Returns the probability that a sample from the distribution is larger than the specified value. (Inherited from ContinuousDistribution.)
	Sample	Returns a random sample from the distribution. (Inherited from ContinuousDistribution.)
	Sample(Int32)	Returns a vector of random samples from the distribution. (Inherited from ContinuousDistribution.)
	Sample(Random)	Returns a random sample from the distribution. (Inherited from ContinuousDistribution.)
	Sample(Int32, Random)	Returns a vector of random samples from the distribution. (Inherited from ContinuousDistribution.)
	Sample(Random, Double)	Returns a single random sample from an exponential distribution with the specified scale parameter.
	Sample(Random, IListDouble)	Fills a list with random numbers from the distribution. (Inherited from ContinuousDistribution.)
	Sample(Random, IListDouble, Int32, Int32)	Fills part of a list with random numbers from the distribution. (Inherited from ContinuousDistribution.)
	SampleInto(Random, IListDouble)	Fills a list with random numbers from the distribution. (Inherited from ContinuousDistribution.)
	SampleInto(Random, IListDouble, Int32, Int32)	Fills part of a list with random numbers from the distribution. (Inherited from ContinuousDistribution.)
	SurvivorDistributionFunction	Evaluates the survivor distribution function (SDF) of this distribution for the specified value. (Overrides ContinuousDistributionSurvivorDistributionFunction(Double).)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Overrides ObjectToString.)
	TwoTailedProbability	Returns the probability that a sample from the distribution deviates from the mean more than the specified value. (Inherited from ContinuousDistribution.)

The exponential distribution characterizes the waiting time for an event when the probability of the event occurring is constant.

The exponential distribution has one parameter: ScaleParameter, which corresponds to the waiting time until an event occurs.

The discrete form of the exponential distribution is the Geometric distribution.

The exponential distribution is also complementary to the Poisson distribution. Where the Poisson distribution models the number of occurrances in a given time interval, the exponential distribution models the time until the next occurrance.

Numerical Libraries

Reference