[SciPy-User] Issues with lfilter after version upgrade

Richard Lyon rchrdlyon1@gmail....
Sat Jan 16 09:33:32 CST 2010


Hi,

Problem:
=======

Been successfully using scipy to run various signal processing 
simulations. Recently upgraded python, numpy and scipy. Now find lfilter 
in signal processing appears to crash the python interpreter.

Details:
========

Window Vista
python 2.6.4
pywin32 214
numpy 1.4.0
scipy 0.7.1

The following code crashes

----------------------------------------------------------
from numpy import zeros
from scipy.signal import lfilter

print 'Testing lfilter'
B = [ +9.9416310E-01, -1.9883262E+00, +9.9416310E-01 ]
A = [ +1.0000000E+00, -1.9882920E+00, +9.8836030E-01 ]
z = zeros(2)
x0 = zeros(80)
# fails on this next line
(x1, z) = lfilter(B, A, x0, -1, z)
print 'Finished'
----------------------------------------------------------

Haven't seen any other problems yet.

Regards
RLYON




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