#' MHHM2 test function generator.
#'
#' @param in.dim [\code{integer(1)}] \cr
#' Size of parameter space. Must be two.
#' @param out.dim [\code{integer(1)}] \cr
#' Size of target space. Must be three.
#' @return A \code{mooFunction}.
#'
#' @references
#' wfg [57]
#'
#' @aliases mhhm2 MHHM2
generateMHHM2 = function(in.dim = 2L, out.dim = 3L) {
in.dim = asCount(in.dim)
out.dim = asCount(out.dim)
if (in.dim != 2L)
stop("MHHM2 supports only in.dim = 2.")
if (out.dim != 3L)
stop("MHHM2 supports only out.dim = 3.")
param.set = makeNumericParamSet(id = "x", len = in.dim, lower = 0, upper = 1)
paretoSet = NULL
paretoFront = NULL
mooFunction(
name = "mhhm2",
id = sprintf("mhhm2-%id-%id", in.dim, out.dim),
fun = mhhm2,
in.dim = in.dim,
out.dim = out.dim,
param.set = param.set,
paretoSet = paretoSet,
paretoFront = paretoFront)
}
# Definiton of mhhm2
mhhm2 = function(x) {
f1 = (x[1L] - 0.8)^2 + (x[2L] - 0.6)^2
f2 = (x[1L] - 0.85)^2 + (x[2L] - 0.7)^2
f3 = (x[1L] - 0.9)^2 + (x[2L] - 0.6)^2
return(c(f1, f2, f3))
}
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