Trait vecfx::StatsExt

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pub trait StatsExt {
    // Required methods
    fn sum(&self) -> f64;
    fn min(&self) -> f64;
    fn max(&self) -> f64;
    fn mean(&self) -> f64;
    fn var(&self) -> f64;
    fn std_dev(&self) -> f64;
    fn imin(&self) -> usize;
    fn imax(&self) -> usize;
}

Expand description

Trait that provides simple descriptive statistics on a univariate set of numeric samples.

Required Methods§

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fn sum(&self) -> f64

Sum of the samples.

Note: this method sacrifices performance at the altar of accuracy Depends on IEEE-754 arithmetic guarantees. See proof of correctness at: “Adaptive Precision Floating-Point Arithmetic and Fast Robust Geometric Predicates”

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fn min(&self) -> f64

Minimum value of the samples.

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fn max(&self) -> f64

Maximum value of the samples.

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fn mean(&self) -> f64

Arithmetic mean (average) of the samples: sum divided by sample-count.

See: https://en.wikipedia.org/wiki/Arithmetic_mean

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fn var(&self) -> f64

Variance of the samples: bias-corrected mean of the squares of the differences of each sample from the sample mean. Note that this calculates the sample variance rather than the population variance, which is assumed to be unknown. It therefore corrects the (n-1)/n bias that would appear if we calculated a population variance, by dividing by (n-1) rather than n.

See: https://en.wikipedia.org/wiki/Variance

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