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Module « scipy.special »

Fonction bdtrin - module scipy.special

Signature de la fonction bdtrin

def bdtrin(*args, **kwargs) 

Description

help(scipy.special.bdtrin)

bdtrin(x1, x2, x3, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature])

bdtrin(k, y, p, out=None)

Inverse function to `bdtr` with respect to `n`.

Finds the number of events `n` such that the sum of the terms 0 through
`k` of the Binomial probability density for events with probability `p` is
equal to the given cumulative probability `y`.

Parameters
----------
k : array_like
    Number of successes (float).
y : array_like
    Cumulative probability (probability of `k` or fewer successes in `n`
    events).
p : array_like
    Success probability (float).
out : ndarray, optional
    Optional output array for the function values

Returns
-------
n : scalar or ndarray
    The number of events `n` such that `bdtr(k, n, p) = y`.

See Also
--------
bdtr

Notes
-----
Formula 26.5.24 of [1]_ is used to reduce the binomial distribution to the
cumulative incomplete beta distribution.

Computation of `n` involves a search for a value that produces the desired
value of `y`. The search relies on the monotonicity of `y` with `n`.

Wrapper for the CDFLIB [2]_ Fortran routine `cdfbin`.

References
----------
.. [1] Milton Abramowitz and Irene A. Stegun, eds.
       Handbook of Mathematical Functions with Formulas,
       Graphs, and Mathematical Tables. New York: Dover, 1972.
.. [2] Barry Brown, James Lovato, and Kathy Russell,
       CDFLIB: Library of Fortran Routines for Cumulative Distribution
       Functions, Inverses, and Other Parameters.

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