# Use Interactive Plots

Use this guide when you want to generate the Bokeh-based interactive
posterior plot.

## Install plotting support

The interactive 2D plot requires the plotting extra:

```bash
pip install "psma[plotting]"
```

If you want hover molecule depictions from SMILES, RDKit must also be
available.

## Generate the interactive plot

The package provides `plot_posterior_2d_interactive(...)` in
`psma.plot`.

The NCATS-sol plotting tutorial shows the full path:

See [Plot NCATS-sol](../tutorials/plot-ncats-sol.ipynb).

## What the interactive plot adds

- legend-toggle layers
- posterior heatmap
- posterior contour hover
- molecule-point hover metadata
- optional RDKit-rendered hover structures

## Common failure mode

If Bokeh is not installed, the interactive helper raises a clear
`ImportError` telling you to install the plotting extra.