model.matrix is used.
Non factor features will be left untouched and passed to the result.createDummyFeatures(obj, target = character(0L), method = "1-of-n",
exclude = character(0L))data.frame | Task]. Same type as obj.capLargeValues,
dropFeatures,
mergeSmallFactorLevels,
normalizeFeatures,
removeConstantFeatures,
summarizeColumns