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Line chart with Confidence Interval Band Example #532

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Feb 28, 2018
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Line chart with Confidence Interval Band Example #532

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23 changes: 23 additions & 0 deletions altair/vegalite/v2/examples/line_with_ci.py
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"""
Line chart with Confidence Interval Band
========================================
This example shows how to make a line chart with a confidence interval Band
"""

import altair as alt
from vega_datasets import data

cars = data.cars()

line = alt.Chart(cars).mark_line().encode(
x='Year',
y='mean(Miles_per_Gallon)'
)

confidence_interval = alt.Chart(cars).mark_area(opacity=0.3).encode(
x='Year',
y=alt.Y('ci0(Miles_per_Gallon)', axis=alt.Axis(title='Miles/Gallon')),
y2='ci1(Miles_per_Gallon)'
)

chart = confidence_interval + line