Trait NormalEquations 

pub trait NormalEquations {
    // Required methods
    fn residual(&mut self, x: &[f64]) -> Vec<f64>;
    fn normal(
        &mut self,
        x: &[f64],
        f: &[f64],
    ) -> Result<(Mat<f64>, Vec<f64>), DspError>;
}

Supplies the residual and the normal equations of a least-squares problem.

Required Methods

fn residual(&mut self, x: &[f64]) -> Vec<f64>

Residual f(x), counted in nfev like SciPy’s fun.

fn normal( &mut self, x: &[f64], f: &[f64], ) -> Result<(Mat<f64>, Vec<f64>), DspError>

JᵀJ (n-by-n, both triangles filled) and Jᵀf at x, using the residual just returned for the same x. Counted in njev like SciPy’s jac.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors