[SciPy-dev] Problem with flapack

Heiko Henkelmann heiko at hhenkelmann.de
Fri Feb 15 14:49:49 CST 2002


Pearu,

thank you for fixing the problem. Here the result from a short test:

>>> from scipy import *
>>> from scipy import signal as s
>>> s.poly(s.roots([1.,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]))
array([  1.+0.00000000e+000j,   2.-1.89030962e-015j,   3.+3.97294109e-015j,
              4.+2.16188134e-015j,   5.-5.21090017e-014j,
              6.-1.44872571e-013j,   7.-2.18532601e-013j,
              8.-2.36476441e-013j,   9.-2.38065611e-013j,
             10.-4.36395620e-013j,  11.-9.58807728e-013j,
             12.-1.45392938e-012j,  13.-1.52765658e-012j,
             14.-1.21333755e-012j,  15.-6.78134691e-013j,
             16.-2.67591593e-013j,  17.-7.35574790e-014j,
             18.-8.47677514e-014j,  19.-1.43588852e-013j,
             20.-9.54262406e-014j])
>>>


It works fine. It should be possible to polish the values, in order to get
rid of the small imaginary error, in the function poly.

Heiko





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