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obitools4/autodoc/docmd/pkg/obistats/minmax.md
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Eric Coissac 8c7017a99d ⬆️ version bump to v4.5
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obistats Package — Core Statistical Functions

The obistats package provides generic, type-safe implementations of fundamental descriptive statistics for numeric types in Go.

Key Functions

  • Max[T]()
    Returns the maximum value in a slice of numeric types (int, int864, float32/64).
    Implementation: Iterates once, tracking the largest element.

  • Min[T]()
    Returns the minimum value in a slice of numeric types (including unsigned integers: uint, uint864).
    Implementation: Single-pass scan, comparing each element to the current minimum.

  • Mode[T]()
    Computes the most frequent value (mode) for signed integer types only (int, int864).
    Implementation: Builds a frequency map, then selects the value with highest count.

Design Notes

  • Generics: All functions use Go type parameters ([T ...]) for compile-time safety and performance.
  • Type Scope:
    • Max supports signed integers + floats (no unsigned).
    • Min includes all integer variants.
    • Mode is restricted to signed integers (due to map key constraints and semantics).
  • Assumptions: Input slices are non-empty; no explicit error handling for edge cases (e.g., empty input).
  • Use Case: Lightweight, reusable utility functions suitable for statistical pipelines or exploratory data analysis.

⚠️ Note: No mean, median, variance, or standard deviation functions are provided in this excerpt.