CDF

Returns the area from zero to x under the beta density.

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C++

The CDF of the Beta distribution is identical to the regularized beta function:

$CDF(x; a, b) = I(x; a, b) = \frac{B(x; a, b)} {B(a, b)}$

where $\inline B(x; a, b)$ is the incomplete beta function and $\inline B(a, b)$ is the (complete) beta function.

An illustration is given below:

There is an error with your graph parameters for CDF with options x=0:1 a=2 b=1:5:5 .size=medium

Error Message:Function CDF failed. Ensure that: Invalid C++

Cephes Math Library Release 2.8: June, 2000

Source code is available when you buy a Commercial licence.

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