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

.. _gallery_layered_chart_bar_mark:


Bar and Tick Chart
------------------
How to layer a tick chart on top of a bar chart.


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

    
    import altair as alt
    import pandas as pd

    source = pd.DataFrame({
        'project': ['a', 'b', 'c', 'd', 'e', 'f', 'g'],
        'score': [25, 57, 23, 19, 8, 47, 8],
        'goal': [25, 47, 30, 27, 38, 19, 4]
    })

    bar = alt.Chart(source).mark_bar().encode(
        x='project',
        y='score'
    ).properties(
        width=alt.Step(40)  # controls width of bar.
    )

    tick = alt.Chart(source).mark_tick(
        color='red',
        thickness=2,
        size=40 * 0.9,  # controls width of tick.
    ).encode(
        x='project',
        y='goal'
    )

    bar + tick


.. toctree::
   :hidden: