:orphan:
:html_theme.sidebar_secondary.remove:

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

.. _gallery_bar_chart_with_highlighted_bar:


Bar Chart with Highlighted Bar
------------------------------
This example shows a basic bar chart with a single bar highlighted.


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


    import altair as alt
    from vega_datasets import data

    source = data.wheat()

    alt.Chart(source).mark_bar().encode(
        x='year:O',
        y="wheat:Q",
        # The highlight will be set on the result of a conditional statement
        color=alt.condition(
            alt.datum.year == 1810,  # If the year is 1810 this test returns True,
            alt.value('orange'),     # which sets the bar orange.
            alt.value('steelblue')   # And if it's not true it sets the bar steelblue.
        )
    ).properties(width=600)
    # 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
            from vega_datasets import data

            source = data.wheat()

            alt.Chart(source).mark_bar().encode(
                x='year:O',
                y="wheat:Q",
                # The highlight will be set on the result of a conditional statement
                color=alt.condition(
                    alt.datum.year == 1810,  # If the year is 1810 this test returns True,
                    alt.value('orange'),     # which sets the bar orange.
                    alt.value('steelblue')   # And if it's not true it sets the bar steelblue.
                )
            ).properties(width=600)


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

        .. code:: python


            import altair as alt
            from vega_datasets import data

            source = data.wheat()

            alt.Chart(source).mark_bar().encode(
                x='year:O',
                y="wheat:Q",
                # The highlight will be set on the result of a conditional statement
                color=alt.condition(
                    alt.datum.year == 1810,  # If the year is 1810 this test returns True,
                    alt.value('orange'),     # which sets the bar orange.
                    alt.value('steelblue')   # And if it's not true it sets the bar steelblue.
                )
            ).properties(width=600)
            # No channel encoding options are specified in this chart
            # so the code is the same as for the method-based syntax.