Streamgraph

This example shows the streamgraph from vega-lite examples.

Method syntax

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(format='%Y', domain=False, tickSize=0),
    alt.Y('sum(count):Q').stack('center').axis(None),
    alt.Color('series:N').scale(scheme='category20b')
).interactive()

Attribute syntax

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()