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# atoti.stats.beta.cdf()

### atoti.stats.beta.cdf(point, /, \*, alpha, beta)

Cumulative distribution function for a beta distribution.

<Warning>
  This feature is [`experimental`](./atoti.experimental#atoti.experimental), its key is `"stats.beta.cdf"`.
</Warning>

The cdf of the beta distribution with shape parameters $\alpha$ and $\beta$ is

$$
\operatorname {{cdf}}(x) = I_x(\alpha,\beta)
$$

Where $I$ is the [regularized incomplete beta function](https://en.wikipedia.org/wiki/Beta_function#Incomplete_beta_function).

* **Parameters:**
  * **point** (*VariableMeasureConvertible*) – The point where the function is evaluated.
  * **alpha** (*NumericMeasureConvertible*) – The alpha parameter of the distribution.
  * **beta** (*NumericMeasureConvertible*) – The beta parameter of the distribution.
* **Return type:**
  *MeasureDefinition*

<Callout icon="link">
  **See also**:
  [The beta distribution Wikipedia page](https://en.wikipedia.org/wiki/Beta_distribution).
</Callout>