online-statistics 0.2.6

Blazingly fast, generic, and serializable online statistics.
Documentation 
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use num::{Float, FromPrimitive};
use std::ops::{AddAssign, SubAssign};
pub trait Univariate<F: Float + FromPrimitive + AddAssign + SubAssign> {
    fn update(&mut self, x: F);
    fn get(&self) -> F;
}

pub trait Bivariate<F: Float + FromPrimitive + AddAssign + SubAssign> {
    fn update(&mut self, x: F, y: F);
    fn get(&self) -> F;
}

pub trait Revertable<F: Float + FromPrimitive + AddAssign + SubAssign> {
    fn revert(&mut self, x: F) -> Result<(), &'static str>;
}

pub trait RollableUnivariate<F: Float + FromPrimitive + AddAssign + SubAssign>:
    Revertable<F> + Univariate<F>
{
}