Enum ArpackMode 

pub enum ArpackMode {
    Regular,
    ShiftInvert {
        sigma: f64,
    },
}

The kind of eigenproblem ARPACK solves (the mode field of igraph_arpack_options_t).

Variants

Regular

Standard problem A x = lambda x, driven by products y = A x (mode = 1). The default.

ShiftInvert

Shift-and-invert mode (mode = 3): the operator is (A - sigma I)^-1, so that the eigenvalues of A closest to sigma become the largest in magnitude. With the closure-based solvers the closure must compute y = (A - sigma I)^-1 x; the returned eigenvalues are those of A. SparseMat::arpack_rssolve factorizes A - sigma I itself.

Fields

sigma: f64

The shift.

Trait Implementations

impl Clone for ArpackMode

fn clone(&self) -> ArpackMode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ArpackMode

impl Debug for ArpackMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ArpackMode

fn default() -> ArpackMode

Returns the “default value” for a type.

impl PartialEq for ArpackMode

fn eq(&self, other: &ArpackMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ArpackMode