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"""
Stacked Bar Chart with Text Overlay
===================================
This example shows how to overlay text on a stacked bar chart. For both the
bar and text marks, we use the ``stack`` argument in the ``x`` encoding to
cause the values to be stacked horizontally.
"""
# category: bar charts
import altair as alt
from vega_datasets import data
source=data.barley()
bars = alt.Chart(source).mark_bar().encode(
x=alt.X('sum(yield):Q').stack('zero'),
y=alt.Y('variety:N'),
color=alt.Color('site')
)
text = alt.Chart(source).mark_text(dx=-15, dy=3, color='white').encode(
x=alt.X('sum(yield):Q').stack('zero'),
y=alt.Y('variety:N'),
detail='site:N',
text=alt.Text('sum(yield):Q', format='.1f')
)
bars + text
|
