"""
Wilkinson Dot Plot
------------------
An example of a `Wilkinson Dot Plot <https://en.wikipedia.org/wiki/Dot_plot_(statistics)>`_
"""
# category: advanced calculations

import altair as alt
import pandas as pd

source = pd.DataFrame(
    {"data":[1,1,1,1,1,1,1,1,1,1,
             2,2,2,
             3,3,
             4,4,4,4,4,4]
    }
)

alt.Chart(source, height=100).mark_circle(opacity=1).transform_window(
    id='rank()',
    groupby=['data']
).encode(
    alt.X('data:O'),
    alt.Y('id:O').axis(None).sort('descending')
)