append append_n_null append_null has init initSeq insert insert_n_null insert_n_null insert_null read read_all_names read_buffer_row_count read_column_count read_index read_info read_n read_n read_n_indices read_n_segments read_n_segments read_n_segments_to read_n_segments_to read_n_segments_to read_n_segments_to read_n_to read_n_to read_n_to read_n_to read_name read_row_count read_segment read_segment_to read_segment_to read_to read_to readAllNames readBufferRowCount readColumnCount readIndex readIndices readInfo readName readRowCount readSegment readSegmentSeq readSegmentSeq readSegmentSeqTo readSegmentTo readSeq readSeq readSeqTo readTo remove remove_n removeSeq rename update_name write write_n write_n write_n_segments write_n_segments write_segment writeSegment writeSegmentSeq writeSeq

read_n() [2/2] std::vector< VecColumn< T, N > > read_n ( std::vector< ColumnKey >  keys ) const Read a vector of columns with given names or indices. Example usages: // Heterogeneous sequence (returns a tuple) auto columns = ext.read_n(as<int>("A"), as<float, 2>("B"), as<std::string>("C")); auto columns = ext.read_n(as<int>(0), as<float, 2>(3), as<std::string>(4)); // Homogeneous sequence (returns a vector) auto columns = ext.read_n<int, 2>({"A", "B", "C"}); auto columns = ext.read_n<int, 2>({0, 3, 4}); Warning Multidimensional columns are read as vector columns as of today.