Indices of two samples of given index into distance matrix.

computeIdxFromDistIdx computes the indices of two points whose distance appears at given position in a distance matrix (as computed by dist).

computeIdxFromDistIdx(n, i)

Arguments

n	number of points
i	index into the distance matrix

Value

a vector of two indices of points whose distance appears at given position in a distance matrix.

See also

computeDistIdx

Examples

x <- 1:10
d <- dist(x)

# entries holding distances between point 3 and 7
i<-computeDistIdx(length(x), 3, 7)
print(i)
#> [1] 21

# restore indices of the points:
ii<-computeIdxFromDistIdx(length(x), i)
#> [1] 6.946222
#> [1] 3
print(ii)
#> [1] 3 7