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altairvega-lite

Semi Circle Donut Chart with Altair

I'm new to Altair. Could you help me to figure out how to plot something like this in Python?

enter image description here

Solution

  • This seems to work for me.

    import pandas as pd
import altair as alt

source = pd.DataFrame({"category": [1, 2, 3, 4, 5, 6], "value": [4, 6, 10, 3, 7, 8]})

pie = alt.Chart(source).mark_arc(innerRadius=75).encode(
    theta=alt.Theta(field="value", type="quantitative", stack=True, scale=alt.Scale(type="linear",rangeMax=1.5708, rangeMin=-1.5708 )),
    color=alt.Color(field="category", type="nominal"),
)

pie + pie.mark_text(radius=170, fontSize=16).encode(text='category')

    enter image description here