Assemble anchor targets from prototype sets — dkge_anchor_targets_from

Convenience helper that stacks calls to [dkge_anchor_contrast_from_prototypes()] so the resulting matrix can be fed directly to [dkge_classify()] as a weight specification.

Usage

dkge_anchor_targets_from_prototypes(
  anchors,
  prototypes,
  negatives = NULL,
  sigma = NULL,
  normalize = TRUE
)

Arguments

anchors: Matrix of anchor coordinates (`L x d`).
prototypes: Named list whose elements are matrices (rows = prototypes in the same feature space as `anchors`). List names become class labels.
negatives: Optional named list of matrices providing negative prototypes per class (matched by name). When `NULL`, classes are contrasted against the origin.
sigma: Optional bandwidth passed to [dkge_anchor_contrast_from_prototypes()]. Defaults to the per-class median heuristic.
normalize: Logical indicator forwarded to [dkge_anchor_contrast_from_prototypes()].

Value

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

Examples

anchors <- matrix(rnorm(10 * 4), 10, 4)
proto <- list(
  classA = anchors[1:2, , drop = FALSE],
  classB = anchors[3:4, , drop = FALSE]
)
W <- dkge_anchor_targets_from_prototypes(anchors, proto)
dim(W)
#> [1]  2 10