public DecisionTreeService(
DataTable data,
IDictionary <string, string[]> metaInfo,
ILogger logger)
{
_logger = logger;
_codebook = new Codebook(data, metaInfo);
var vars = ParseMetaInfo(metaInfo);
var inputInfo = vars.Take(vars.Length - 1).ToArray();
var outputInfo = vars.Last();
_treeInfo = new TreeInfo()
{
Inputs = inputInfo.Select(x => x.Name).ToArray(),
Output = outputInfo.Name
};
var inputs = _codebook.GetArray(_treeInfo.Inputs);
var outputs = _codebook.GetArray(_treeInfo.Output);
_treeBuilder = new Id3Algorithm(inputInfo, outputInfo);
_tree = _treeBuilder.Learn(inputs, outputs);
}
public Id3Algorithm(DecisionVariable[] inputs, DecisionVariable outputType)
{
_tree = new Models.DecisionTree(inputs, outputType);
_numberOfOuputRange = _tree.NumberOfOuputClasses;
_numberOfInputsRange = _tree.Attributes.Select(x => x.RangeLength).ToArray();
}
