24 lines
531 B
Python
24 lines
531 B
Python
"""
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Quantile-Quantile Plot
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----------------------
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A quantile-quantile plot comparing input data to theoretical distributions.
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"""
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# category: scatter plots
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import altair as alt
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from vega_datasets import data
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source = data.normal_2d.url
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base = alt.Chart(source).transform_quantile(
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'u',
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step=0.01,
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as_ = ['p', 'v']
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).transform_calculate(
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uniform = 'quantileUniform(datum.p)',
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normal = 'quantileNormal(datum.p)'
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).mark_point().encode(
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alt.Y('v:Q')
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)
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base.encode(x='uniform:Q') | base.encode(x='normal:Q')
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