# StatsModels Documentation

This package provides common abstractions and utilities for specifying, fitting, and evaluating statistical models. The goal is to provide an API for package developers implementing different kinds of statistical models (see the GLM package for example), and utilities that are generally useful for both users and developers when dealing with statistical models and tabular data.

Formula notation for specifying models based on tabular data

`Formula`

`ModelFrame`

`ModelMatrix`

Contrast coding for categorical data

Abstract model types

`StatisticalModel`

`RegressionModel`

Much of this package was formerly part of `DataFrames`

and `StatsBase`

.