Exponential distribution.
Its probability density function is
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for x > 0 and 0 elsewhere.
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is the scale parameter,
which is the inverse of the rate parameter
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The rate parameter is an alternative, widely used parameterization
of the exponential distribution [R132].
The exponential distribution is a continuous analogue of the
geometric distribution. It describes many common situations, such as
the size of raindrops measured over many rainstorms [R130], or the time
between page requests to Wikipedia [R131].
Parameters: | scale : float
The scale parameter,
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size : tuple of ints
Number of samples to draw. The output is shaped
according to size.
|
References
[R130] | (1, 2) Peyton Z. Peebles Jr., “Probability, Random Variables and
Random Signal Principles”, 4th ed, 2001, p. 57. |