On Thu, Jul 4, 2013 at 7:50 PM, Stephen Harrison <msteveharri...@gmail.com> wrote: > The XML for filter_rational_resampler_xxx sets the default value of Taps to > None. However, this gives the error Expression "[None]" is invalid for type > complex vector. > > Deleting "None" from this box fixes the problem. Is it safe to change my XML > definition to have no default value?
Stephen, There is a bug filed on our Redmine Issues page about the use of '[' and ']' on different systems. I think this might be the same problem you're seeing with the '[None]' instead of just 'None'. The rational_resampler is a hier_block2 (in gr-filter/python/filter), and if you tell it the taps are None, it will automatically calculate a set of taps for you. It makes an allpass filter for the original signal. Off the top of my head, I'm not sure what happens if you leave this block empty. It might be fine since the taps argument for this block has a default of 'None', or it might think that the you are passing an empty list of taps, in which case it wouldn't be correct. You can easily test this by using the rational_resampler block as an integer upsampler and looking at the output. If you see big images that aren't being supressed, you aren't filtering. My guess is that the latter is happening. If 'None' is being read as '[None]', then I think '' will become '[]'. Tom _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
