On Tue, 8 Mar 2005, James Cooley wrote:
> =============================
> In python, the code to build the flow graph to split, take the fir
> (average over 2in this example), and combine looks like this:
>
> for i in range(0,fft_size):
> averagefir = gr.fir_filter_fff(1, [1/2,1/2])
> fg.connect((separator,i),averagefir)
> fg.connect(averagefir,(combiner,i))
>
> (BTW, doing the above, in python, is "averagefir" a new instance at
> every iteration as I expect it to be?)
>
Hmmm, that might work but you won't be able to reference a particular
averagefir later. You could use a subscript (maybe, I don't know!).
I just finished something similar, but for filter taps to switch
into an audio filter. The taps are calculated with:
audio_lpf_x = []
for co in range(600,3601,100):
fc=gr.firdes.low_pass(1.0,af_sample_rate,co,300,gr.firdes.WIN_HAMMING)
audio_lpf_x += [fc]
then audio_lpf_x[0] is the 600hz, [1] is 700hz, etc to [30] is 3600hz.
Once the graph is running I can change audio bw with
X.set_taps(audio_lpf_x[filter])
--Chuck
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