private static FoldValidationResult <TSolution> ProcessFold <TSolution>(string[][] folds, int testFoldIndex, ICaseFrame cases, ICaseTransformer pipeline, Reasoner reasoner)
{
var watch = Stopwatch.StartNew();
var result = new FoldValidationResult <TSolution>(testFoldIndex, folds[testFoldIndex].Length);
var testFold = cases.FilterCases(folds[testFoldIndex]);
var trainFold = cases.FilterCases(folds.Where((f, i) => i != testFoldIndex).SelectMany(f => f));
pipeline.Prepare(trainFold);
testFold = pipeline.Transform(testFold);
trainFold = pipeline.Transform(trainFold);
reasoner.SetData(trainFold);
using (var cursor = testFold.GetCaseCursor())
{
while (cursor.MoveNext())
{
var trueSolution = cursor.GetSolution <TSolution>();
var predictedSolution = reasoner.GetSolution <TSolution>(cursor);
result.AddPrediction(trueSolution, predictedSolution);
}
}
watch.Stop();
result.ValidationTime = watch.ElapsedMilliseconds;
return(result);
}