# API Reference

```{toctree}
:maxdepth: 2
:caption: Contents:

```

## Dichotomous variables

correlation coefficients for dichotomous (binary) variables

```{autosummary}
:toctree: generated
:recursive:

ordinalcorr.biserial
ordinalcorr.point_biserial
ordinalcorr.tetrachoric
```

## Polytomous variables

correlation coefficients for polytomous (ordered categorical) variables

```{autosummary}
:toctree: generated
:recursive:

ordinalcorr.polychoric
ordinalcorr.polyserial
```

## Correlation Matrix

```{autosummary}
:toctree: generated
:recursive:

ordinalcorr.hetcor
```