GPfit, laGP, mlegp, tgp, DiceKriging, GauPro, testthat, lhs,
ggplot2, reshape, numDeriv
GPfit, laGP, mlegp, tgp, DiceKriging, CGP, GauPro, hetGP,
testthat, lhs, ggplot2, reshape, ContourFunctions, numDeriv