ndarray_linalg::tridiagonal

Trait ReciprocalConditionNumTridiagonal

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

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

Required Methods§

source

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§

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

source§

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

Implementors§