23 lines
502 B
Python
23 lines
502 B
Python
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"""
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Line Chart with Confidence Interval Band
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How to make a line chart with a bootstrapped 95% confidence interval band.
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"""
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# category: line charts
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import altair as alt
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from vega_datasets import data
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source = data.cars()
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line = alt.Chart(source).mark_line().encode(
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x='Year',
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y='mean(Miles_per_Gallon)'
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)
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band = alt.Chart(source).mark_errorband(extent='ci').encode(
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x='Year',
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y=alt.Y('Miles_per_Gallon', title='Miles/Gallon'),
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)
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band + line
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