:orphan:
:html_theme.sidebar_secondary.remove:

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

.. _gallery_cumulative_count_chart:


Cumulative Count Chart
----------------------
This example shows an area chart with cumulative count.
Adapted from https://vega.github.io/vega-lite/examples/area_cumulative_freq.html



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



    import altair as alt
    from vega_datasets import data

    source = data.movies.url

    alt.Chart(source).transform_window(
        cumulative_count="count()",
        sort=[{"field": "IMDB_Rating"}],
    ).mark_area().encode(
        x="IMDB_Rating:Q",
        y="cumulative_count:Q"
    )
    # 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.movies.url

            alt.Chart(source).transform_window(
                cumulative_count="count()",
                sort=[{"field": "IMDB_Rating"}],
            ).mark_area().encode(
                x="IMDB_Rating:Q",
                y="cumulative_count:Q"
            )


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

        .. code:: python



            import altair as alt
            from vega_datasets import data

            source = data.movies.url

            alt.Chart(source).transform_window(
                cumulative_count="count()",
                sort=[{"field": "IMDB_Rating"}],
            ).mark_area().encode(
                x="IMDB_Rating:Q",
                y="cumulative_count:Q"
            )
            # No channel encoding options are specified in this chart
            # so the code is the same as for the method-based syntax.