`scipy.stats._continuous_distns:expon_gen`

source: /scipy/stats/_continuous_distns.py :2050

Signature

   class     expon_gen (    momtype    =  1   ,    a    =  None   ,    b    =  None   ,    xtol    =  1e-14   ,    badvalue    =  None   ,    name    =  None   ,    longname    =  None   ,    shapes    =  None   ,    seed    =  None     )

Members

_cdf
_entropy
_isf
_logpdf
_logsf
_pdf
_ppf
_rvs
_sf
_shape_info
_stats
fit

Summary

An exponential continuous random variable.

Extended Summary

%(before_notes)s

Notes

The probability density function for expon is:

f (x) = exp (- x)

for $x \geq 0$ .

%(after_notes)s

A common parameterization for expon is in terms of the rate parameter lambda, such that pdf = lambda * exp(-lambda * x). This parameterization corresponds to using scale = 1 / lambda.

The exponential distribution is a special case of the gamma distributions, with gamma shape parameter a = 1.

%(example)s

Aliases

scipy.stats._continuous_distns.expon_gen