gnuradiocore/src/lib/filter (in trunk) contains three apparently
identical
implementations of single pole iir filter
gr_single_pole_avg_filter_ff
gr_single_pole_rec_filter_ff
gr_single_pole_iir_filter_ff
only gr_single_pole_iir_filter_ff seems to be callable from python
(filter.ionly includes iir_filter)
any good reasons to keep the others around?
Tim