# Examples

Examples from real datasets you'd actually analyse.

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:::{grid-item-card} Visium mouse brain
:link: /notebooks/examples/visium_mouse_brain
:link-type: doc
:img-top: /notebooks/_static/img/visium_mouse_brain.png

Render H&E tissue, overlay spots, color by gene expression and by cluster,
and finish with a publication-style figure.
:::

:::{grid-item-card} Interactive region annotation
:link: /notebooks/examples/interactive_annotate
:link-type: doc
:img-top: /notebooks/_static/img/interactive_annotate.png

Draw regions of interest directly on a `spatialdata-plot` canvas with
`sdata.pl.annotate(...)` and persist them as a `ShapesModel` element.
:::

:::{grid-item-card} Datashader reductions
:link: /notebooks/examples/datashader_reductions
:link-type: doc
:img-top: /notebooks/_static/img/datashader_reductions.png

How overlapping primitives aggregate a continuous colour on the datashader
backend: `datashader_reduction` (`max`/`mean`/`sum`/`count`/`std`),
`method="datashader"` for images, and the contrast caveat.
:::

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```{toctree}
:hidden:
:maxdepth: 1

visium_mouse_brain
interactive_annotate
datashader_reductions
```