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stopIfLearnerParams = function(par.set) {
if(any(vlapply(par.set$pars, function(x) inherits(x, "LearnerParameter"))))
stop("No par.set parameter in 'generateDesign' can be of class 'LearnerParameter'!
Use basic parameters instead to describe you region of interest!")
}
stopIfFunOrUntypedParams = function(par.set) {
types = getParamTypes(par.set)
not.ok = intersect(c("untyped", "function", "character", "charactervector"), types)
if (length(not.ok) > 0L)
stopf("Parameters of this type are not allowed, but were found: %s", collapse(not.ok))
}
doBasicGenDesignChecks = function(par.set) {
assertClass(par.set, "ParamSet")
if (isEmpty(par.set))
stop("par.set must not be empty!")
stopIfLearnerParams(par.set)
stopIfFunOrUntypedParams(par.set)
lower = getLower(par.set, with.nr = TRUE)
upper = getUpper(par.set, with.nr = TRUE)
if (any(is.infinite(c(lower, upper))))
stop("Finite box constraints required!")
return(list(lower = lower, upper = upper))
}
getParamNA = function(par, repeated = FALSE) {
v = switch(par$type,
numeric = NA_real_,
numericvector = NA_real_,
integer = NA_integer_,
integervector = NA_integer_,
discrete = NA_character_,
discretevector = NA_character_,
logical = NA,
logicalvector = NA,
character = NA_character_,
charactervector = NA_character_
)
if (repeated)
v = rep(v, par$len)
return(v)
}
# Create a list with the values from getValues, but respect vector parameters and
# create a single list item for each vector component named paramId.number
getParamSetValues = function(par.set) {
pids1 = getParamIds(par.set, repeated = TRUE, with.nr = TRUE)
pids2 = getParamIds(par.set, repeated = TRUE, with.nr = FALSE)
values1 = getValues(par.set)
values2 = lapply(pids2, function(x) {names(values1[[x]])})
setNames(values2, pids1)
}
# Makes sure we keep all levels of a discrete vector and also keep them in order.
fixDesignFactors = function(des, par.set) {
types.df = getParamTypes(par.set, df.cols = TRUE)
values = getParamSetValues(par.set)
for (i in which(types.df == "factor")) {
des[, i] = factor(des[, i], levels = values[[colnames(des)[i]]])
}
des
}
# Ensure that the types of Design columns are always correct,
# e.g., columns that are always NA or integer if default in integer par is numeric
fixDesignVarTypes = function(des, par.set) {
types = getParamTypes(par.set, use.names = TRUE, df.cols = TRUE)
for(p in colnames(des)) {
des[, p] = as(des[, p], types[p])
}
des
}
# Convert Expressions to call (what we get from quote)
convertExpressionToCall = function(req) {
if (is.expression(req)) {
if (length(req) == 1) {
return(req[[1]])
} else {
return(substitute(eval(x), list(x=req)))
}
}
req
}
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