diff options
| author | Tom Rondeau <trondeau@vt.edu> | 2012-12-27 10:09:02 -0500 |
|---|---|---|
| committer | Tom Rondeau <trondeau@vt.edu> | 2012-12-27 10:09:02 -0500 |
| commit | 6a8fc327dc2cbd1fa63b9acd08fa90baea0758e8 (patch) | |
| tree | 597c7c6fd7b4623601c6d8e9935a7100a1a79a0e /gr-filter/python | |
| parent | 3332574d8e9e3432e46efb6765daf5c68fa12001 (diff) | |
filter: handle a log10(0) warning that causes QT to crash when designing filters.
Diffstat (limited to 'gr-filter/python')
| -rw-r--r-- | gr-filter/python/design/filter_design.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gr-filter/python/design/filter_design.py b/gr-filter/python/design/filter_design.py index 556ac8edf7..748a435c63 100644 --- a/gr-filter/python/design/filter_design.py +++ b/gr-filter/python/design/filter_design.py @@ -1077,7 +1077,13 @@ class gr_plot_filter(QtGui.QMainWindow): Ts = 1.0/fs fftpts = fftpack.fft(taps, Npts) self.freq = scipy.arange(0, fs, 1.0/(Npts*Ts)) - self.fftdB = 20.0*scipy.log10(abs(fftpts)) + with warnings.catch_warnings(record=True) as w: + warnings.simplefilter("always") + self.fftdB = 20.0*scipy.log10(abs(fftpts)) + if any(self.fftdB == float('-inf')): + sys.stderr.write('Filter design failed (taking log10 of 0).\n') + self.fftdB = scipy.zeros([len(fftpts)]) + self.fftDeg = scipy.unwrap(scipy.angle(fftpts)) self.groupDelay = -scipy.diff(self.fftDeg) self.phaseDelay = -self.fftDeg[1:]/self.freq[1:] |