Trellis Stacked Bar Chart

This is an example of a horizontal stacked bar chart using data which contains crop yields over different regions and different years in the 1930s.

Method syntax

import altair as alt
from vega_datasets import data

source = data.barley()

alt.Chart(source).mark_bar().encode(
    column='year:O',
    x='yield',
    y='variety',
    color='site'
).properties(width=220)

Attribute syntax

import altair as alt
from vega_datasets import data

source = data.barley()

alt.Chart(source).mark_bar().encode(
    column='year:O',
    x='yield',
    y='variety',
    color='site'
).properties(width=220)
# No channel encoding options are specified in this chart
# so the code is the same as for the method-based syntax.