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+--- Thread: Beta Inverse Function (/thread-5090.html)
Beta Inverse Function - ankur2207 - Sep-18-2017
Hi Everyone,
I'm looking for a Beta Inverse Function in Python.
Below is the explanation for the same:
Returns the inverse of the beta cumulative probability density function (BETA.DIST).
If probability = BETA.DIST(x,...TRUE), then BETA.INV(probability,...) = x. The beta distribution can be used in project planning to model probable completion times given an expected completion time and variability.
Below is the Excel version of this solution:
BETA.INV(probability,alpha,beta,[A],[B])
The BETA.INV function syntax has the following arguments:
Probability Required. A probability associated with the beta distribution.
Alpha Required. A parameter of the distribution.
Beta Required. A parameter the distribution.
A Optional. A lower bound to the interval of x.
B Optional. An upper bound to the interval of x.
Could you please navigate me for the correct solution in Python.
Many thanks in advance.
Regards,
Ankur K
RE: Beta Inverse Function - ichabod801 - Sep-18-2017
I think you want to look at scipy.stats.
RE: Beta Inverse Function - ankur2207 - Sep-19-2017
No Sir,
It just not have the required functionality.
Could you please let me know any other package where I can search.
Regards,
Ankur K
RE: Beta Inverse Function - ichabod801 - Sep-19-2017
Isn't scipy.stats.beta.ppf the inverse of the CDF?
RE: Beta Inverse Function - andrewmkeller - Jul-23-2018
Nailed it ichabod801! Using scipy.stats.beta.ppf gave me exactly what I was looking for and matches Excel's Beta.INV function perfectly.
RE: Beta Inverse Function - ichabod801 - Jul-23-2018
(Jul-23-2018, 08:18 PM)andrewmkeller Wrote: Nailed it ichabod801! Using scipy.stats.beta.ppf gave me exactly what I was looking for and matches Excel's Beta.INV function perfectly.
Uh, as a former statistician I am leary of using Excel as a benchmark.
