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datafusion::functions_aggregate::variance - Rust
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Module datafusion::functions_aggregate::variance

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VarianceSample: covariance sample aggregations.

Structs§

  • VarianceAccumulator
    An accumulator to compute variance The algrithm used is an online implementation and numerically stable. It is based on this paper: Welford, B. P. (1962). “Note on a method for calculating corrected sums of squares and products”. Technometrics. 4 (3): 419–420. doi:10.2307/1266577. JSTOR 1266577.
  • VarianceSample

Functions§