:orphan:
:html_theme.sidebar_secondary.remove:

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

.. _gallery_step_chart:


Step Chart
----------
This example shows Google's stock price over time.
This uses the "step-after" interpolation scheme.
The full list of interpolation options includes 'linear',
'linear-closed', 'step', 'step-before', 'step-after', 'basis',
'basis-open', 'basis-closed', 'cardinal', 'cardinal-open',
'cardinal-closed', 'bundle', and 'monotone'.


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


    import altair as alt
    from vega_datasets import data

    source = data.stocks()

    alt.Chart(source).mark_line(interpolate='step-after').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_line(interpolate='step-after').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_line(interpolate='step-after').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.