Struct ForwardOperator 

pub struct ForwardOperator {
    pub gain: Array2<f64>,
    pub source_nn: Array2<f64>,
    pub n_sources: usize,
    pub orientation: SourceOrientation,
    pub depth_exp: Option<f64>,
}

Forward operator (gain matrix + metadata).

The gain matrix maps source activations to sensor measurements: x(t) = G @ j(t) + noise.

Construction

• From a raw gain matrix: ForwardOperator::new_fixed or ForwardOperator::new_free.
• From electrode positions + source space: forward::make_sphere_forward.

Fields

gain: Array2<f64>

Gain matrix, shape [n_channels, n_sources × n_orient].

source_nn: Array2<f64>

Source normals/orientations, shape [n_sources × n_orient, 3].

n_sources: usize

Number of source locations.

orientation: SourceOrientation

Orientation mode.

depth_exp: Option<f64>

Depth-weighting exponent (0.8 for MEG, 2–5 for EEG). None = no depth weighting.

Implementations

impl ForwardOperator

pub fn new_fixed(gain: Array2<f64>) -> Self

Create a fixed-orientation forward operator from a gain matrix [n_channels, n_sources].

Source normals are initialised to zero; set ForwardOperator::source_nn manually if you need proper normals for PickOri::Normal.

pub fn new_free(gain: Array2<f64>) -> Self

Create a free-orientation forward operator from a gain matrix [n_channels, n_sources × 3].

Panics if gain.ncols() is not divisible by 3.

pub fn n_orient(&self) -> usize

Number of orientations per source (1 for fixed, 3 for free).

Trait Implementations

impl Clone for ForwardOperator

fn clone(&self) -> ForwardOperator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ForwardOperator

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

Formats the value using the given formatter.