What is nominalSearch?

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specifies the method for finding a split on a nominal input. Alias: nomSearch. The tkcasdt_nomSearchOpts value can be one or more of the following: handling: "CLASSIC" | "ENHANCED". maxCategories: specifies the maximum number of levels for a splitting rule to include. Aliases: maxCats, maxLevels, maxValues, cluster, minCardCluster. Default: 128. Minimum value: 0. shrinkage: specifies how much weight to give the category average in the sort method. Default: 10. Minimum value: 0. sort: specifies the minimum cardinality of an input to use the sort method. Alias: minCardSort. Default: 10. Minimum value: 0. sortBy: "COUNT" | "TARGET".
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gbtreeTrain

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