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"""
Streamgraph
-----------------
This example shows the streamgraph from vega-lite examples.
"""
# category: area charts
import altair as alt
from vega_datasets import data
source = data.unemployment_across_industries.url
alt.Chart(source).mark_area().encode(
alt.X('yearmonth(date):T',
axis=alt.Axis(format='%Y', domain=False, tickSize=0)
),
alt.Y('sum(count):Q', stack='center', axis=None),
alt.Color('series:N',
scale=alt.Scale(scheme='category20b')
)
).interactive()
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