er_pack.m er_plot.m er_reverse.m er_shift.m er_soap.m er_spectrans.m er_upsample.m er_add.m er_blaschke.m er_conv.m er_fconv.m er_firlsinv.m er_fsample.m er_fwindow.m er_iirlsinv_fir.m er_lpf.m er_lpfc1.m er_lpfc2.m er_modulate.m