This is documentation for an old release of SciPy (version 1.4.0). Read this page in the documentation of the latest stable release (version 1.15.1).
scipy.special.chdtr¶
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scipy.special.chdtr(v, x) = <ufunc 'chdtr'>¶ Chi square cumulative distribution function
Returns the area under the left hand tail (from 0 to x) of the Chi square probability density function with v degrees of freedom:
1/(2**(v/2) * gamma(v/2)) * integral(t**(v/2-1) * exp(-t/2), t=0..x)