Trait ndarray_linalg::tridiagonal::ReciprocalConditionNumTridiagonal

pub trait ReciprocalConditionNumTridiagonal<A: Scalar> {
    fn rcond_tridiagonal(&self) -> Result<A::Real>;
}

An interface for estimating the reciprocal condition number of tridiagonal matrix refs.

Required methods

fn rcond_tridiagonal(&self) -> Result<A::Real>

Estimates the reciprocal of the condition number of the tridiagonal matrix in 1-norm.

This method uses the LAPACK *gtcon routines, which estimate self.inv_tridiagonal().opnorm_one() and then compute rcond = 1. / (self.opnorm_one() * self.inv_tridiagonal().opnorm_one()).

• If rcond is near 0., the matrix is badly conditioned.
• If rcond is near 1., the matrix is well conditioned.

Implementations on Foreign Types

impl<A, S> ReciprocalConditionNumTridiagonal<A> for ArrayBase<S, Ix2> where
    A: Scalar + Lapack,
    S: Data<Elem = A>, 

fn rcond_tridiagonal(&self) -> Result<A::Real>

Implementors

impl<A> ReciprocalConditionNumTridiagonal<A> for LUFactorizedTridiagonal<A> where
    A: Scalar + Lapack,