Added vega_datasets install instructions to the top of the example gallery
@@ -34,6 +34,12 @@ This gallery contains a selection of examples of the plots Altair can create.
Some may seem fairly complicated at first glance, but they are built by combining a simple set of declarative building blocks.
+Many draw upon sample datasets compiled by the `Vega <https://vega.github.io/vega/>`_ project. To access them yourself, install `vega_datasets <https://github.com/altair-viz/vega_datasets>`_.
+
+.. code-block::
+
+ $ pip install vega_datasets
+
{% for grouper, group in examples %}
.. _gallery-category-{{ grouper }}:
