Am getting the following error when trying to run a GRC flowgraph that loads FFT filter taps from an external file. The type filter parameter is set to complex->complex (complex taps). The flow graph has imported numpy. The taps are loaded using: numpy.fromfile('/home/tom/Desktop/EchoScreencaps/chirp-down-20-20-131072', numpy.complex64) as the taps parameter. What does the error below mean? GRC: v3.7.4git-101-g76970d54 Ubuntu 13.10 top_block.py is attached. -- Tom, N5EG Traceback (most recent call last): File "/home/tom/Desktop/EchoScreencaps/top_block.py", line 173, in <module> tb = top_block() File "/home/tom/Desktop/EchoScreencaps/top_block.py", line 115, in __init__ self.fft_filter_xxx_0 = filter.fft_filter_ccc(1, (numpy.fromfile('/home/tom/Desktop/EchoScreencaps/chirp-down-20-20-131072', numpy.complex64)), 1) File "/usr/local/lib/python2.7/dist-packages/gnuradio/filter/filter_swig.py", line 1329, in make return _filter_swig.fft_filter_ccc_make(*args, **kwargs) TypeError: in method 'fft_filter_ccc_make', argument 2 of type 'std::vector< gr_complex,std::allocator< gr_complex > > const &'

on 2014-04-19 19:29

on 2014-04-20 17:46

On Sat, Apr 19, 2014 at 1:27 PM, Tom McDermott <tom.n5eg@gmail.com> wrote: > GRC: v3.7.4git-101-g76970d54 > File "/home/tom/Desktop/EchoScreencaps/top_block.py", line 115, in > Tom, This is a conflict between the numpy array data type and swig. Call the .tolist() function on the array passed back from numpy and it should work. Tom

on 2014-04-20 18:24

Thanks, Tom that solved the problem. numpy.fromfile('filename', numpy.complex64).tolist() Should the gnuradio wiki (GRC) text be updated? Apologies for the triple posting, first two attempts were using yahoo.commail account, got bit by the yahoo DMARC problem and dumped from the list. Changed to gmail to avoid the problem. -- Tom, N5EG

on 2014-04-20 18:30

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Strange: For me, the problem persists (at least with random dummy data from a random file in /tmp): >>> taps = numpy.fromfile("/tmp/tblatex-4.png", dtype=numpy.complex64).tolist() >>> fffilter = filter.fft_filter_ccc(1, taps ,1) Traceback (most recent call last): File "<input>", line 1, in <module> File "/home/marcus/.usrlocal/lib64/python2.7/site-packages/gnuradio/filter/filter_swig.py", line 1329, in make return _filter_swig.fft_filter_ccc_make(*args, **kwargs) TypeError: in method 'fft_filter_ccc_make', argument 2 of type 'std::vector< gr_complex,std::allocator< gr_complex > > const &' Greetings, Marcus On 20.04.2014 18:24, Tom McDermott wrote: > -- Tom, N5EG >>> Am getting the following error when trying to run a GRC >>> flowgraph that loads FFT filter taps from an external file. The >>> type filter parameter is set to complex->complex (complex >>> taps). The flow graph has imported numpy. The taps are loaded >>> using: >>> >>> numpy.fromfile('/home/tom/Desktop/EchoScreencaps/chirp-down-20-20-131072', >>> >>> numpy.complex64) >>> "/home/tom/Desktop/EchoScreencaps/top_block.py", line 173, in >>> <module> tb = top_block() File >>> "/home/tom/Desktop/EchoScreencaps/top_block.py", line 115, in >>> __init__ self.fft_filter_xxx_0 = filter.fft_filter_ccc(1, >>> (numpy.fromfile('/home/tom/Desktop/EchoScreencaps/chirp-down-20-20-131072', >>> >>> numpy.complex64)), 1) >>> File >>> "/usr/local/lib/python2.7/dist-packages/gnuradio/filter/filter_swig.py", >>> >>> line 1329, in make >> Call the .tolist() function on the array passed back from numpy > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTU/XlAAoJEBQ6EdjyzlHtZWkH/jJQqxauQAOVHZQ2+uPj7MoW Fqbnvcoo4jgbW9fey+GNn6CsnFjzcfCi4VahEkX7ysBMLU194wXCVa3vdIsWMGB1 LqcvptQUX0mS/Aso8W4i0MP2utDxOj7xAKzsvE0eEHUh7G+WkJvd1yJoBnwvW3ng wVCqj31lReOx2qCq0vKqpFcBC256yOGXeARVBUaBaRaXHUU4cxdWhXH11W1vKInJ pOds2U0z1brTgz808qRRfHu4L8PdR7B6Q0xfTW6X45Iq7D1/OvaazgI6FSBu1qa3 tsdWlipOiBHFWAnIz6LVORROJe40xXzcKKnCNFR3buZkt/XPHCHwH2ruWS3rkdM= =DmUg -----END PGP SIGNATURE-----

on 2014-04-20 18:39

On Sun, Apr 20, 2014 at 12:24 PM, Tom McDermott <tom.n5eg@gmail.com> wrote: > -- Tom, N5EG > Absolutely update the wiki page with helpful tips like this. Which page in particular are you referring to? Tom