find_mutual_nn

Identify Mutual Nearest Neighbors Between Groups

Usage

find_mutual_nn(distance, k, dis_thresh = NULL)

Arguments

distance

A numeric symmetric distance matrix.

k

Integer. Number of neighbors to consider per group.

dis_thresh

Optional numeric threshold. If set, only mutual neighbors with distance < threshold are returned.

Value

A data frame of mutual nearest neighbor pairs with columns:

group1

Index of first group

group2

Index of second group

dist

Distance between groups

Details

Finds mutually shared k-nearest neighbors from both row and column perspectives of a distance matrix. Optionally filters by a distance threshold.

Examples

dist_mat <- as.matrix(dist(matrix(rnorm(100), nrow = 10)))
mnn_df <- find_mutual_nn(dist_mat, k = 3, dis_thresh = 0.5)
head(mnn_df)
#>   group1 group2 dist
#> 1      1      1    0
#> 2      2      2    0
#> 3      3      3    0
#> 4      4      4    0
#> 5      5      5    0
#> 6      6      6    0