camelback {DiceKriging} | R Documentation |
Camelback 2-dimensional test function.
camelback(x)
x |
a 2-dimensional vector specifying the location where the function is to be evaluated. |
The Camelback function is usually defined over the domain [-3,-2] x [3, 2]. Here, the function is adapted to the domain [0,1] x [0,1]. It has 2 global minima : x1 = c(0.5149730,0.3218374); x2 = c(0.4850263,0.6781641)
A real number equal to the Camelback function values at x
D. Ginsbourger, Ecole des Mines de St-Etienne.
n.grid <- 20 x.grid <- y.grid <- seq(0,1,length=n.grid) design.grid <- expand.grid(x.grid, y.grid) response.grid <- apply(design.grid, 1, camelback) z.grid <- matrix(response.grid, n.grid, n.grid) contour(x.grid,y.grid,z.grid,20) x1 = c(0.5149730,0.3218374); x2 = c(0.4850263,0.6781641) points(rbind(t(x1), t(x2)), pch=19, col="red") title("Fonction Camelback")