Assemble anchor targets from feature-space directions

Converts named direction vectors into anchor weight rows using [dkge_anchor_contrast_from_direction()].

Usage

dkge_anchor_targets_from_directions(
  anchors,
  directions,
  sigma = NULL,
  normalize = TRUE
)

Arguments

anchors

Matrix of anchor coordinates (`L x d`).

directions

Either a named list of numeric vectors (length `d`) or a matrix whose rows are named directions in the same feature space as `anchors`.

sigma

Optional bandwidth forwarded to [dkge_anchor_contrast_from_direction()].

normalize

Logical; when `TRUE` (default) the resulting weights are L2-normalised.

Value

Matrix with one row per supplied direction and `nrow(anchors)` columns.

Examples

anchors <- matrix(rnorm(10 * 4), 10, 4)
dirs <- list(classA = rnorm(4), classB = rnorm(4))
W <- dkge_anchor_targets_from_directions(anchors, dirs)
dim(W)
#> [1]  2 10