method
Generator.exponential(scale=1.0, size=None)
Draw samples from an exponential distribution.
Its probability density function is
for x > 0
and 0 elsewhere. is the scale parameter, which is the inverse of the rate parameter . The rate parameter is an alternative, widely used parameterization of the exponential distribution [3].
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 [1], or the time between page requests to Wikipedia [2].
Parameters: |
|
---|---|
Returns: |
|
[1] | Peyton Z. Peebles Jr., “Probability, Random Variables and Random Signal Principles”, 4th ed, 2001, p. 57. |
[2] | Wikipedia, “Poisson process”, https://en.wikipedia.org/wiki/Poisson_process |
[3] | Wikipedia, “Exponential distribution”, https://en.wikipedia.org/wiki/Exponential_distribution |
© 2005–2019 NumPy Developers
Licensed under the 3-clause BSD License.
https://docs.scipy.org/doc/numpy-1.17.0/reference/random/generated/numpy.random.Generator.exponential.html