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MathGroup Archive 2005

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Re: Bode Plots in Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57249] Re: Bode Plots in Mathematica
  • From: "Nasser Abbasi" <nma at 12000.org>
  • Date: Sun, 22 May 2005 00:14:13 -0400 (EDT)
  • References: <d6mmhf$gg8$1@smc.vnet.net>
  • Reply-to: "Nasser Abbasi" <nma at 12000.org>
  • Sender: owner-wri-mathgroup at wolfram.com

> David Park
> djmp at earthlink.net
> http://home.earthlink.net/~djmp/
>
>
>

David;

Nice work.

few comments (this is on 5.1):

The x-axis (the frequency axis) usually has the values displayed all
as powers of 10. i.e. as in 10^-2, 10^-1, 10^0, 10^1, etc...

Your output shows these as 10^-2, 0.1, 0, 10, but then uses 10^2 after
that, I think it is better to have all these shown in one format which
is 10^n.

You might want to label the x-axis also as 'frequency (rad/sec)' as
that is the standard instead of 's'.

The 'standard' also is to show the phase and magnitude on separate
plots and not on the same one.

You might want to label the y-axis as 'Phase(degrees)' and
'Magnitude(db)' instead of just 'db' and 'phase'.

Is the BodePlot[] function supposed to be inside one of your packages?
I had to cut/paste the code from the news server posting to define it
even though I just downloaded your packages and loaded
Needs["DrawGraphics`DrawingMaster`"]
Needs["Graphics`Graphics`"]

and thanks for your work.

Nasser


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