DExp-class

0th

Percentile

Class "DExp"

The double exponential or Laplace distribution with rate $\lambda$ has density $$f(x) = \frac{1}{2}\lambda {e}^{- \lambda |x|}$$ C.f. Exp-class, rexp

Keywords
distribution
Objects from the Class

Objects can be created by calls of the form DExp(rate). This object is a double exponential (or Laplace) distribution.

Extends

Class "AbscontDistribution", directly. Class "UnivariateDistribution", by class "AbscontDistribution". Class "Distribution", by class "AbscontDistribution".

See Also

Exp-class ExpParameter-class AbscontDistribution-class Reals-class rexp

Aliases
  • DExp-class
  • DExp
  • Laplace
  • DoubleExponential
  • initialize,DExp-method
Examples
D <- DExp(rate = 1) # D is a Laplace distribution with rate = 1.
r(D)(1) # one random number generated from this distribution, e.g. 0.4190765
d(D)(1) # Density of this distribution is 0.1839397 for x = 1.
p(D)(1) # Probability that x < 1 is 0.8160603.
q(D)(.1) # Probability that x < -1.609438 is 0.1.
rate(D) # rate of this distribution is 1.
rate(D) <- 2 # rate of this distribution is now 2.
3*D ###  still a DExp -distribution
Documentation reproduced from package distr, version 1.8, License: GPL (version 2 or later)

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