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BetaI(x, a, b)

The incomplete beta function.

The incomplete beta function returns the cumulative probability for a Beta(a, b) distribution at «x», defined by:

[math]\displaystyle{ BetaI(x,a,b) = {1\over{BetaFn(a,b)}} \int_0^x x^{a-1} (1-x)^{b-1} dx }[/math]


Advanced Math, Distribution Densities Library (Distribution Densities.ana)

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See Also


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