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

.. _gallery_line_percent:


Line Chart with Percent axis
----------------------------
This example shows how to format the tick labels of the
y-axis of a chart as percentages.


.. altair-plot::
    :code-below:

    
    import altair as alt
    from altair.expr import datum
    from vega_datasets import data

    source = data.jobs.url

    alt.Chart(source).mark_line().encode(
        alt.X('year:O'),
        alt.Y('perc:Q', axis=alt.Axis(format='%')),
        color='sex:N'
    ).properties(
        title='Percent of work-force working as Welders'
    ).transform_filter(
        datum.job == 'Welder'
    )


.. toctree::
   :hidden: