Nothing
#####################################################
###
### optimizing mixed space function
###
#####################################################
\dontrun{
library(mlrMBO)
library(ggplot2)
set.seed(1)
configureMlr(show.learner.output = FALSE)
obj.fun = makeSingleObjectiveFunction(
name = "Mixed functions",
fn = function(x) {
if (x$cat == "a")
x$num^2
else
x$num^2 + 3
},
par.set = makeParamSet(
makeDiscreteParam("cat", values = c("a", "b")),
makeNumericParam("num", lower = -5, upper = 5)
),
has.simple.signature = FALSE,
global.opt.value = -1
)
ctrl = makeMBOControl(propose.points = 1L)
ctrl = setMBOControlTermination(ctrl, iters = 10L)
ctrl = setMBOControlInfill(ctrl, crit = makeMBOInfillCritEI(),
opt = "focussearch", opt.focussearch.points = 500L)
lrn = makeMBOLearner(ctrl, obj.fun)
design = generateDesign(4L, getParamSet(obj.fun), fun = lhs::maximinLHS)
run = exampleRun(obj.fun, design = design, learner = lrn,
control = ctrl, points.per.dim = 100L, show.info = TRUE)
print(run)
plotExampleRun(run, densregion = TRUE, gg.objects = list(theme_bw()))
}
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