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Re: Harmonic distortion of a input signal

From Gregory Ewing <greg.ewing@canterbury.ac.nz>
Newsgroups comp.lang.python
Subject Re: Harmonic distortion of a input signal
Date 2013-05-20 13:09 +1200
Message-ID <avtbeiFk3qU1@mid.individual.net> (permalink)
References <eb271b5d-ee83-4f0e-b8ea-5b129c7cb771@googlegroups.com> <bdb22ed6-69a0-48f4-b975-e9af31b72f39@googlegroups.com>

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killybeard91@gmail.com wrote:
> One more question. Function np.argmax returns max of non-complex numbers ? 
> Because FFT array of my signal is complex.

You'll want the magnitudes of the complex numbers.
Actually the squares of the magnitudes (assuming the
data from the oscilloscope represents voltages),
because you're after a ratio of powers.

-- 
Greg

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Harmonic distortion of a input signal Anti Log <antilogeffects@gmail.com> - 2013-05-19 03:52 -0700
  Re: Harmonic distortion of a input signal Chris Angelico <rosuav@gmail.com> - 2013-05-20 01:34 +1000
    Re: Harmonic distortion of a input signal killybeard91@gmail.com - 2013-05-19 15:25 -0700
      Re: Harmonic distortion of a input signal Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-05-19 23:49 +0100
      Re: Harmonic distortion of a input signal Terry Jan Reedy <tjreedy@udel.edu> - 2013-05-19 19:19 -0400
  Re: Harmonic distortion of a input signal killybeard91@gmail.com - 2013-05-19 15:59 -0700
  Re: Harmonic distortion of a input signal killybeard91@gmail.com - 2013-05-19 16:03 -0700
  Re: Harmonic distortion of a input signal killybeard91@gmail.com - 2013-05-19 16:36 -0700
    Re: Harmonic distortion of a input signal Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-05-20 13:09 +1200
    Re: Harmonic distortion of a input signal Dave Angel <davea@davea.name> - 2013-05-19 21:11 -0400
      Re: Harmonic distortion of a input signal jmfauth <wxjmfauth@gmail.com> - 2013-05-20 10:23 -0700
        Re: Harmonic distortion of a input signal Christian Gollwitzer <auriocus@gmx.de> - 2013-05-20 19:50 +0200
          Re: Harmonic distortion of a input signal Christian Gollwitzer <auriocus@gmx.de> - 2013-05-20 19:56 +0200
            Re: Harmonic distortion of a input signal jmfauth <wxjmfauth@gmail.com> - 2013-05-23 04:44 -0700
        Re: Harmonic distortion of a input signal Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-05-21 15:58 +0100

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