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"""
Bar Chart with Highlighted Bar
------------------------------
This example shows a basic bar chart with a single bar highlighted.
"""
# category: bar charts
import altair as alt
from vega_datasets import data
source = data.wheat()
alt.Chart(source).mark_bar().encode(
x='year:O',
y="wheat:Q",
# The highlight will be set on the result of a conditional statement
color=alt.condition(
alt.datum.year == 1810, # If the year is 1810 this test returns True,
alt.value('orange'), # which sets the bar orange.
alt.value('steelblue') # And if it's not true it sets the bar steelblue.
)
).properties(width=600)
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