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java.lang.Objectpal.statistics.GammaDistribution
pal.statistics.ExponentialDistribution
public class ExponentialDistribution
exponential distribution. (Parameter: lambda; mean: 1/lambda; variance: 1/lambda^2) The exponential distribution is a special case of the Gamma distribution (shape parameter = 1.0, scale = 1/lambda).
Constructor Summary | |
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ExponentialDistribution()
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Method Summary | |
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static double |
cdf(double x,
double lambda)
cumulative density function of the exponential distribution |
static double |
mean(double lambda)
mean of the exponential distribution |
static double |
pdf(double x,
double lambda)
probability density function of the exponential distribution (mean = 1/lambda) |
static double |
quantile(double y,
double lambda)
quantile (inverse cumulative density function) of the exponential distribution |
static double |
variance(double lambda)
variance of the exponential distribution |
Methods inherited from class pal.statistics.GammaDistribution |
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cdf, mean, pdf, quantile, variance |
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 ExponentialDistribution()
Method Detail |
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public static double pdf(double x, double lambda)
x
- argumentlambda
- parameter of exponential distribution
public static double cdf(double x, double lambda)
x
- argumentlambda
- parameter of exponential distribution
public static double quantile(double y, double lambda)
y
- argumentlambda
- parameter of exponential distribution
public static double mean(double lambda)
lambda
- parameter of exponential distribution
public static double variance(double lambda)
lambda
- parameter of exponential distribution
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