TrainTestEvaluator can't accept same collection for train and testing. #307

var pipeline = new LearningPipeline();
var data = new List<IrisData>() {
    new IrisData { SepalLength = 1f, SepalWidth = 1f ,PetalLength=0.3f, PetalWidth=5.1f, Label=1},
    new IrisData { SepalLength = 1f, SepalWidth = 1f ,PetalLength=0.3f, PetalWidth=5.1f, Label=1},
    new IrisData { SepalLength = 1.2f, SepalWidth = 0.5f ,PetalLength=0.3f, PetalWidth=5.1f, Label=0}
};
var collection = CollectionDataSource.Create(data);
pipeline.Add(collection);
pipeline.Add(new ColumnConcatenator(outputColumn: "Features",
    "SepalLength", "SepalWidth", "PetalLength", "PetalWidth"));
pipeline.Add(new StochasticDualCoordinateAscentClassifier());
var tt = new TrainTestEvaluator().TrainTestEvaluate<IrisData, IrisPrediction>(pipeline, collection);