public ClassificationModel TrainGroupWise(int i, int[][] y, BaseVector[] x, IGroupDataProvider data)
{
int[][] yb = ToBinaryClasses(y, i);
if (ranker == null || groupWiseNfeatures[i] >= x[0].Length)
{
return(classifier.Train(x, yb, 2, classifierParam, 1));
}
int[] o = ranker.Rank(x, yb, 2, rankerParam, data, 1);
int[] inds = nfeatures < o.Length ? ArrayUtils.SubArray(o, groupWiseNfeatures[i]) : o;
return(new ClassificationOnSubFeatures(classifier.Train(ExtractFeatures(x, inds), yb, 2, classifierParam, 1), inds));
}
public ClassificationModel[] Train(BaseVector[] x, int[][] y, int ngroups, int[] rankedFeatures,
IGroupDataProvider data)
{
int[] o = ranker.Rank(x, y, ngroups, rankerParam, data, 1); //TODO
Array.Copy(o, rankedFeatures, o.Length);
int[] sizes = GetSizes(x[0].Length, reductionFactor, maxFeatures);
ClassificationModel[] result = new ClassificationModel[sizes.Length];
for (int i = 0; i < result.Length; i++)
{
if (i == 0 && sizes[0] == x[0].Length)
{
result[0] = classifier.Train(x, y, ngroups, classifierParam, 1);
}
else
{
int[] inds = ArrayUtils.SubArray(o, sizes[i]);
result[i] =
new ClassificationOnSubFeatures(
classifier.Train(ClassificationWithRanking.ExtractFeatures(x, inds), y, ngroups, classifierParam, 1), inds);
}
}
return(result);
}
