[Scipy-tickets] [SciPy] #1812: Erratic phase plot for high order filters
SciPy Trac
scipy-tickets@scipy....
Thu Jan 24 22:27:35 CST 2013
#1812: Erratic phase plot for high order filters
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Reporter: kitmonisit | Owner: cdavid
Type: defect | Status: new
Priority: normal | Milestone: Unscheduled
Component: scipy.signal | Version: 0.11.0
Keywords: |
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Comment(by kitmonisit):
I looked up the code for {{{scipy.signal.lti.bode}}} If I remember
correctly, it uses the two-argument arctangent, which returns the angle in
radians from [0 to pi) or [0 to -pi]. When converting that to degrees,
naturally everything wraps around, limiting the angles to below |180|
degrees.
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Ticket URL: <http://projects.scipy.org/scipy/ticket/1812#comment:3>
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