statsmodels.distributions.discrete.DiscretizedCount.ppf

DiscretizedCount.ppf(q, *args, **kwds)

Percent point function (inverse of cdf) at q of the given RV.

Parameters:

  • q (array_like) – Lower tail probability.

  • arg1 (array_like) – The shape parameter(s) for the distribution (see docstring of the instance object for more information).

  • arg2 (array_like) – The shape parameter(s) for the distribution (see docstring of the instance object for more information).

  • arg3 (array_like) – The shape parameter(s) for the distribution (see docstring of the instance object for more information).

  • ... (array_like) – The shape parameter(s) for the distribution (see docstring of the instance object for more information).

  • loc (array_like, optional) – Location parameter (default=0).

Returns:

k – Quantile corresponding to the lower tail probability, q.

Return type:

array_like

Notes

For discrete distributions, the cdf is not strictly invertible. By convention, this method returns the minimum value k for which the cdf at k is at least q. There is one exception: the ppf of 0 is a-1, where a is the left endpoint of the support.