:orphan:
:html_theme.sidebar_secondary.remove:

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

.. _gallery_filled_step_chart:


Filled Step Chart
-----------------
This example shows Google's stock price over time as a step chart with its area filled in and its line emphasized.


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


    import altair as alt
    from vega_datasets import data

    source = data.stocks()

    alt.Chart(source).mark_area(
        color="lightblue",
        interpolate='step-after',
        line=True
    ).encode(
        x='date',
        y='price'
    ).transform_filter(alt.datum.symbol == 'GOOG')
    # 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.stocks()

            alt.Chart(source).mark_area(
                color="lightblue",
                interpolate='step-after',
                line=True
            ).encode(
                x='date',
                y='price'
            ).transform_filter(alt.datum.symbol == 'GOOG')


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

        .. code:: python


            import altair as alt
            from vega_datasets import data

            source = data.stocks()

            alt.Chart(source).mark_area(
                color="lightblue",
                interpolate='step-after',
                line=True
            ).encode(
                x='date',
                y='price'
            ).transform_filter(alt.datum.symbol == 'GOOG')
            # No channel encoding options are specified in this chart
            # so the code is the same as for the method-based syntax.