[Scipy-tickets] [SciPy] #1812: Erratic phase plot for high order filters

SciPy Trac scipy-tickets@scipy....
Fri Jan 25 02:57:32 CST 2013


#1812: Erratic phase plot for high order filters
--------------------------+-------------------------------------------------
 Reporter:  kitmonisit    |       Owner:  cdavid     
     Type:  defect        |      Status:  new        
 Priority:  normal        |   Milestone:  Unscheduled
Component:  scipy.signal  |     Version:  0.11.0     
 Keywords:                |  
--------------------------+-------------------------------------------------

Comment(by kitmonisit):

 Yes, I'm expecting the phase plot to be continuous.

 On the other hand, I can't attest to the factual correctness of the
 results. I tested the same parameters (filter order, pass band, stop band,
 etc) on MATLAB and got slightly different results. (I manually pieced
 together the discontinuities from scipy and compared it with MATLAB's).

 Anyway, the wrap-around problem might be a good first step.

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1812#comment:5>
SciPy <http://www.scipy.org>
SciPy is open-source software for mathematics, science, and engineering.


More information about the Scipy-tickets mailing list