private static void Main(string[] args)
{
if (args.Length != 2)
{
Console.WriteLine("KNN.exe *.names *.data");
return;
}
DateTime start = DateTime.Now;
Console.WriteLine("Start Time: {0}", start);
var builder = new DSBuilder(args);
DataSet data = builder.BuildDataSet();
var sets = data.RandomInstance(800);
var knn = new KNearest(sets[0]);
var fs = new FeatureSelector(knn);
var optimal = fs.ForwardFeatureSelect(Enumerable.Range(0, data.Features.Count - 1).Where(x => x != data.OutputIndex).ToList());
knn.K = optimal.Key;
knn.Features = optimal.Value;
Console.WriteLine("Final Result: {0:0.##}% with K:{1} using Features:{2}",
fs.Test(sets[1].DataEntries) * 100.0,
knn.K,
string.Join(", ", knn.Features.Select(i => data.Features[i].Name).ToArray()));
Console.WriteLine("Run-Time: {0}", DateTime.Now - start);
}
