$ grep get_transposed* features/SparseFeatures.*
features/SparseFeatures.cpp:template<class ST> CSparseFeatures<ST>* CSparseFeatures<ST>::get_transposed()
features/SparseFeatures.cpp:	return new CSparseFeatures<ST>(sparse_feature_matrix.get_transposed());
features/SparseFeatures.h:		CSparseFeatures<ST>* get_transposed();
features/SparseFeatures.h:		SGSparseVector<ST>* get_transposed(int32_t &num_feat, int32_t &num_vec);