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java.lang.Objectpal.statistics.GammaDistribution
public class GammaDistribution
gamma distribution. (Parameters: shape, scale; mean: scale*shape; variance: scale^2*shape)
Constructor Summary | |
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GammaDistribution()
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Method Summary | |
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static double |
cdf(double x,
double shape,
double scale)
cumulative density function of the Gamma distribution |
static double |
mean(double shape,
double scale)
mean of the Gamma distribution |
static double |
pdf(double x,
double shape,
double scale)
probability density function of the Gamma distribution |
static double |
quantile(double y,
double shape,
double scale)
quantile (inverse cumulative density function) of the Gamma distribution |
static double |
variance(double shape,
double scale)
variance of the Gamma distribution |
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 GammaDistribution()
Method Detail |
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public static double pdf(double x, double shape, double scale)
x
- argumentshape
- shape parameterscale
- scale parameter
public static double cdf(double x, double shape, double scale)
x
- argumentshape
- shape parameterscale
- scale parameter
public static double quantile(double y, double shape, double scale)
y
- argumentshape
- shape parameterscale
- scale parameter
public static double mean(double shape, double scale)
shape
- shape parameterscale
- scale parameter
public static double variance(double shape, double scale)
shape
- shape parameterscale
- scale parameter
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