scipy.special.fdtridfd — SciPy v1.15.3 Manual (original) (raw)

scipy.special.fdtridfd(dfn, p, x, out=None) = <ufunc 'fdtridfd'>#

Inverse to fdtr vs dfd

Finds the F density argument dfd such that fdtr(dfn, dfd, x) == p.

Parameters:

dfnarray_like

First parameter (positive float).

parray_like

Cumulative probability, in [0, 1].

xarray_like

Argument (nonnegative float).

outndarray, optional

Optional output array for the function values

Returns:

dfdscalar or ndarray

dfd such that fdtr(dfn, dfd, x) == p.

See also

fdtr

F distribution cumulative distribution function

fdtrc

F distribution survival function

fdtri

F distribution quantile function

scipy.stats.f

F distribution

Examples

Compute the F distribution cumulative distribution function for one parameter set.

from scipy.special import fdtridfd, fdtr dfn, dfd, x = 10, 5, 2 cdf_value = fdtr(dfn, dfd, x) cdf_value 0.7700248806501017

Verify that fdtridfd recovers the original value for dfd:

fdtridfd(dfn, cdf_value, x) 5.0