28 lines
674 B
Python
28 lines
674 B
Python
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"""
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Iowa's renewable energy boom
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----------------------------
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This example is a fully developed stacked chart using the sample dataset of Iowa's electricity sources.
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"""
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# category: case studies
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import altair as alt
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from vega_datasets import data
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source = data.iowa_electricity()
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alt.Chart(source, title="Iowa's renewable energy boom").mark_area().encode(
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x=alt.X(
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"year:T",
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title="Year"
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),
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y=alt.Y(
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"net_generation:Q",
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stack="normalize",
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title="Share of net generation",
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axis=alt.Axis(format=".0%"),
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),
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color=alt.Color(
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"source:N",
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legend=alt.Legend(title="Electricity source"),
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)
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)
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