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25 lines
703 B
Python
25 lines
703 B
Python
"""
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Pie Chart with Labels
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---------------------
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This example shows how to layer text over arc marks (``mark_arc``) to label pie charts.
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This is adapted from a corresponding Vega-Lite Example:
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`Pie Chart with Labels <https://vega.github.io/vega-lite/examples/layer_arc_label.html>`_.
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"""
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# category: circular plots
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import pandas as pd
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import altair as alt
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source = pd.DataFrame(
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{"category": ["a", "b", "c", "d", "e", "f"], "value": [4, 6, 10, 3, 7, 8]}
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)
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base = alt.Chart(source).encode(
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theta=alt.Theta("value:Q", stack=True), color=alt.Color("category:N", legend=None)
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)
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pie = base.mark_arc(outerRadius=120)
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text = base.mark_text(radius=140, size=20).encode(text="category:N")
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pie + text
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