:orphan:
:html_theme.sidebar_secondary.remove:

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

.. _gallery_gantt_chart:


Gantt Chart
-----------------
This example shows how to make a simple Gantt chart.


.. altair-plot::
    :remove-code:
    


    import altair as alt
    import pandas as pd

    source = pd.DataFrame([
        {"task": "A", "start": 1, "end": 3},
        {"task": "B", "start": 3, "end": 8},
        {"task": "C", "start": 8, "end": 10}
    ])

    alt.Chart(source).mark_bar().encode(
        x='start',
        x2='end',
        y='task'
    )
    # No channel encoding options are specified in this chart
    # so the code is the same as for the method-based syntax.


.. tab-set::

    .. tab-item:: Method syntax
        :sync: method

        .. code:: python


            import altair as alt
            import pandas as pd

            source = pd.DataFrame([
                {"task": "A", "start": 1, "end": 3},
                {"task": "B", "start": 3, "end": 8},
                {"task": "C", "start": 8, "end": 10}
            ])

            alt.Chart(source).mark_bar().encode(
                x='start',
                x2='end',
                y='task'
            )


    .. tab-item:: Attribute syntax
        :sync: attribute

        .. code:: python


            import altair as alt
            import pandas as pd

            source = pd.DataFrame([
                {"task": "A", "start": 1, "end": 3},
                {"task": "B", "start": 3, "end": 8},
                {"task": "C", "start": 8, "end": 10}
            ])

            alt.Chart(source).mark_bar().encode(
                x='start',
                x2='end',
                y='task'
            )
            # No channel encoding options are specified in this chart
            # so the code is the same as for the method-based syntax.