DataGenerator.cc

#include <shogun/labels/BinaryLabels.h>
#include <shogun/features/DenseFeatures.h>
#include <shogun/features/DataGenerator.h>

using namespace shogun;

class DataGenerator: public ::testing::Environment
{
protected:
	virtual ~DataGenerator() {}
	virtual void SetUp() 
	{
		CMath::init_random(5);
		SGMatrix<float64_t> data = CDataGenerator::generate_gaussians(100, 2, 2);
		CDenseFeatures<float64_t> features(data);
 
		SGVector<index_t> train_idx(100), test_idx(100);
		SGVector<float64_t> labels(100);
		for (index_t i = 0, j = 0; i < data.num_cols; ++i)
		{
			if (i % 2 == 0)
				train_idx[j] = i;
			else
				test_idx[j++] = i;
 
			labels[i/2] = (i < data.num_cols/2) ? 1.0 : -1.0;
		}
 
		features_train = (CDenseFeatures<float64_t>*)features.copy_subset(train_idx);
		features_test = (CDenseFeatures<float64_t>*)features.copy_subset(test_idx);
 
		CBinaryLabels temp_labels = CBinaryLabels(labels);
		labels_train = (CBinaryLabels*)temp_labels.clone();
		labels_test = (CBinaryLabels*)temp_labels.clone();
	}

	virtual void TearDown() 
	{
		SG_UNREF(features_train);
		SG_UNREF(features_test);
		SG_UNREF(labels_train);
		SG_UNREF(labels_test);
	}

	// data for training
	CDenseFeatures<float64_t>* features_train;
 
	// data for testing
	CDenseFeatures<float64_t>* features_test;
 
	// traning label
	CBinaryLabels* labels_train;
 
	// testing label
	CBinaryLabels* labels_test;
};