is_metric | R Documentation |
Does the distance matric come from a metric
is_distance_matrix(mat, tolerance = .Machine$double.eps^0.5)
triangle_inequality(mat, tolerance = .Machine$double.eps^0.5)
mat |
The matrix to evaluate |
tolerance |
Differences smaller than tolerance are not reported. |
data <- matrix(rnorm(20), ncol = 2)
dm <- pdist(data)
is_distance_matrix(dm)
triangle_inequality(dm)
dm[1, 2] <- 1.1 * dm[1, 2]
is_distance_matrix(dm)
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