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

.. _gallery_line_chart_with_color_datum:


Line Chart with datum for color
-------------------------------
An example of using ``datum`` and ``repeat`` to color a multi-series line chart.
This is adapted from this corresponding Vega-Lite Example:
`Repeat and Layer to Show Different Movie Measures <https://vega.github.io/vega-lite/examples/repeat_layer.html>`_.


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

    

    import altair as alt
    from vega_datasets import data

    source = data.movies()

    alt.Chart(source).mark_line().encode(
        x=alt.X("IMDB_Rating", bin=True),
        y=alt.Y(
            alt.repeat("layer"), aggregate="mean", title="Mean of US and Worldwide Gross"
        ),
        color=alt.datum(alt.repeat("layer")),
    ).repeat(layer=["US_Gross", "Worldwide_Gross"])


.. toctree::
   :hidden: