.. This document is auto-generated by the altair-gallery extension. Do not modify directly.

.. _gallery_layered_area_chart:


Layered Area Chart
------------------
This example shows a layered area chart.


.. altair-plot::
    :code-below:

    
    import altair as alt
    from vega_datasets import data

    source = data.iowa_electricity()

    alt.Chart(source).mark_area(opacity=0.3).encode(
        x="year:T",
        y=alt.Y("net_generation:Q", stack=None),
        color="source:N"
    )


.. toctree::
   :hidden: