:orphan:
:html_theme.sidebar_secondary.remove:

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

.. _gallery_slope_graph:


Slope Graph
-----------------------
This example shows how to make Slope Graph.


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


    import altair as alt
    from vega_datasets import data

    source = data.barley()

    alt.Chart(source).mark_line().encode(
        x='year:O',
        y='median(yield)',
        color='site'
    )
    # 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.barley()

            alt.Chart(source).mark_line().encode(
                x='year:O',
                y='median(yield)',
                color='site'
            )


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

        .. code:: python


            import altair as alt
            from vega_datasets import data

            source = data.barley()

            alt.Chart(source).mark_line().encode(
                x='year:O',
                y='median(yield)',
                color='site'
            )
            # No channel encoding options are specified in this chart
            # so the code is the same as for the method-based syntax.