"""
Horizontal Grouped Bar Chart
----------------------------
This example shows a horizontal grouped bar chart.
"""
# category: bar charts
import altair as alt
from vega_datasets import data

source = data.barley()

(
    alt.Chart(source)
    .mark_bar()
    .encode(x="sum(yield):Q", y="year:O", color="year:N", row="site:N")
)
