paretoFrontKneeIndex: Find the knee of a two dimensional pareto front
In rgp: R genetic programming framework

Description Usage Arguments Value Examples

Given a matrix m of two rows and n columns, representing solutions of a two-dimensional optimization problem, returns the column index of the point with minimum euclidean distance to the utopia point. The utopia point is the point consisting of the row minima of m. NA or NaN values of m are ommited.

1	paretoFrontKneeIndex(m, normalize = TRUE)

`m`	A matrix of two rows and n columns, representing the solutions of a two-dimensional optimization problem.
`normalize`	Whether to normalize both objectives to the interval of [0, 1], defaults to `TRUE`.

The knee point index, i.e. the column index in m of the point of minimum euclidean distance to the utopia point.

m1 <- matrix(runif(200), ncol = 100)
plot(t(m1))
points(t(m1[,emoa::nds_rank(m1) == 1]), col = "red", pch = 16)
pKnee <- m1[, paretoFrontKneeIndex(m1)]
points(t(pKnee), col = "green4", pch = 16)