From bug-octave-request at bevo dot che dot wisc dot edu Wed Feb 19 18:56:09 2003
Subject: freqz's phase units
From: Doug Stewart <dastew at sympatico dot ca>
To: bug-octave at bevo dot che dot wisc dot edu
Date: Wed, 19 Feb 2003 19:55:38 -0500

freqz.m
This is 2 part issue
a) matlab compatibility
b) normal usage by math profs. and engineers

Matlab's freqz uses degrees for phase angle.
If freqz is to produce a Bode plot then it must use degrees

In my copy I have changed

       plot (w, phase/(2*pi), ";Phase (radians/2pi);");

to
## added *360  Doug Stewart
       plot (w, phase*360/(2*pi), ";Phase (radians*360/2pi);");

this makes it compatible and "standard".
Doug Stewart



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