umap.knn {umap}

construct a umap.knn object describing nearest neighbors

Description

construct a umap.knn object describing nearest neighbors

Usage

umap.knn(indexes, distances)

Arguments

indexes

matrix, integers linking data points to nearest neighbors

distances

matrix, distance values between pairs of points specified in the matrix of indexes

Value

object of class umap.knn, which is a list with matrices with indexes of nearest neighbors and distances to those neighbors

Examples

# this example describes a set of three data points (indexes 1,2,3)
# which are equidistant from each other. Hence the distance between
# pairs (i, j) is 0 for i=j and 1 otherwise.
three.indexes = matrix(c(1,2,3,
                         2,1,3,
                         3,1,2), nrow=3, ncol=3)
three.distances = matrix(c(0, 1, 1,
                           0, 1, 1,
                           0, 1, 1), nrow=3, ncol=3)

umap.knn(three.indexes, three.distances)