self-made assign ................\assign_4.asv ................\assign_6.asv ................\er_generation.asv ................\er_generation.m ................\M2_1.m ................\M2_2.m ................\M3.asv ................\M3.m ................\M4.m ................\M4_2.asv ................\M4_2.m ................\upsample.asv