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pliny
17 lines
551 B
Python
17 lines
551 B
Python
"""Shared utilities for analysis modules."""
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from __future__ import annotations
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def gini_coefficient(values: list[float]) -> float:
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"""Compute Gini coefficient of a distribution.
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Returns a value in [0, 1] where 0 = perfectly uniform and 1 = maximally concentrated.
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"""
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if not values or sum(values) == 0:
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return 0.0
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sorted_vals = sorted(values)
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n = len(sorted_vals)
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cumulative = sum((2 * (i + 1) - n - 1) * v for i, v in enumerate(sorted_vals))
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return max(0.0, min(1.0, cumulative / (n * sum(sorted_vals))))
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