public IDataContext SelectLabelsAndFeatures(IList <int> selected_feature_indexes, IList <int> selected_label_indexes)
{
IList <VariableDescriptor> new_feature_descriptors = ToolsCollection.SelectList(feature_descriptors, selected_feature_indexes);
IList <VariableDescriptor> new_label_descriptors = ToolsCollection.SelectList(label_descriptors, selected_label_indexes);
return(new DataContext(new_feature_descriptors, new_label_descriptors));
}