scipy.special.stdtridf

scipy.special.stdtridf(p, t, out=None) = <ufunc 'stdtridf'>

Inverse of stdtr vs df

Returns the argument df such that stdtr(df, t) is equal to p.

Parameters:

parray_like

Probability

tarray_like

Upper bound of the integral

outndarray, optional

Optional output array for the function results

Returns:

dfscalar or ndarray

Value of df such that stdtr(df, t) == p

See also

stdtr

Student t CDF

stdtrit

inverse of stdtr with respect to t

scipy.stats.t

Student t distribution

Examples

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Compute the student t cumulative distribution function for one parameter set.

>>> from scipy.special import stdtr, stdtridf
>>> df, x = 5, 2
>>> cdf_value = stdtr(df, x)
>>> cdf_value
0.9490302605850709

Verify that stdtridf recovers the original value for df given the CDF value and x.

>>> stdtridf(cdf_value, x)
5.0

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