# Use a probability distribution

Model / stats

distribution functions, density estimation

Page: <https://meridian.online/operations/use-a-probability-distribution>

## Status

Not built yet.

arcform does not do this yet. [Its place on the roadmap](https://meridian.online/roadmap#use-a-probability-distribution)

## Variants

- Evaluate a probability distribution: Compute densities, probabilities or samples from a named probability distribution.
- [Estimate density from data](https://meridian.online/operations/use-a-probability-distribution/estimate-density-from-data): Fit a density to a sample, by kernels or a density tree, and read it at query points.

## What other tools call it

Meridian's classification; an independent blind rating agreed on 86.2% of 312 rows (exact class, version 2).

- mlpack: [`Distributions`](https://www.mlpack.org/doc/user/core.html) (read 2026-09-27)
- mlpack: [`mlpack_det`](https://www.mlpack.org/doc/user/bindings/cli.html) (read 2026-09-27)
- mlpack: [`mlpack_kde`](https://www.mlpack.org/doc/user/bindings/cli.html) (read 2026-09-27)