precision_pairs: Precision of Linked Pairs

In clevr: Clustering and Link Prediction Evaluation in R

Precision of Linked Pairs

Description

Computes the precision of a set of predicted coreferent (linked) pairs given a set of ground truth coreferent pairs.

Usage

precision_pairs(true_pairs, pred_pairs, ordered = FALSE)

Arguments

true_pairs	set of true coreferent pairs stored in a matrix or data.frame, where rows index pairs and columns index the ids of the constituents. Any pairs not included are assumed to be non-coreferent. Duplicate pairs (including equivalent pairs with reversed ids) are automatically removed.
pred_pairs	set of predicted coreferent pairs, following the same specification as true_pairs.
ordered	whether to treat the element pairs as ordered—i.e. whether pair (x, y) is distinct from pair (y, x) for x \neq y. Defaults to FALSE, which is appropriate for clustering, undirected link prediction, record linkage etc.

Details

The precision is defined as:

\frac{|T \cap P|}{|P|}

where T is the set of true coreferent pairs and P is the set of predicted coreferent pairs.

Examples

true_pairs <- rbind(c(1,2), c(2,3), c(1,3)) # ground truth is 3-clique
pred_pairs <- rbind(c(1,2), c(2,3))         # prediction misses one edge
num_pairs <- 3                              # assuming 3 elements
precision_pairs(true_pairs, pred_pairs, num_pairs)

clevr documentation built on Sept. 16, 2023, 5:06 p.m.