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

.. _gallery_layer_line_color_rule:


Line Chart with Layered Aggregates
----------------------------------
This example shows how to make a multi series line chart of the daily closing
stock prices for AAPL, AMZN, GOOG, IBM, and MSFT between 2000 and 2010, along
with a layered rule showing the average values.


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

    
    import altair as alt
    from vega_datasets import data

    stocks = data.stocks()

    line = alt.Chart(stocks).mark_line().encode(
        x='date',
        y='price',
        color='symbol'
    ).properties(
        width=600,
        title="Daily closing prices with their aggregate prices"
    ).interactive(bind_y=False)

    rule = alt.Chart(stocks).mark_rule().encode(
        alt.Y('average(price)'),
        color='symbol',
        size=alt.value(2)
    )

    line + rule


.. toctree::
   :hidden: