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MathGroup Archive 2005

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Re: Re: Bode Plots in Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57268] Re: [mg57249] Re: Bode Plots in Mathematica
  • From: DrBob <drbob at bigfoot.com>
  • Date: Mon, 23 May 2005 02:20:37 -0400 (EDT)
  • References: <d6mmhf$gg8$1@smc.vnet.net> <200505220414.AAA17593@smc.vnet.net>
  • Reply-to: drbob at bigfoot.com
  • Sender: owner-wri-mathgroup at wolfram.com

I see no reason to put magnitude and phase on separate plots. Combining them saves space and makes it easier to relate magnitude and phase effects at the same frequency.

With the approximation methods, a chart gets too busy if you combine them, but there's no reason to use those methods, either, so...?

Bobby

On Sun, 22 May 2005 00:14:13 -0400 (EDT), Nasser Abbasi <nma at 12000.org> wrote:

>
>> 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
>
>
>
>



-- 
DrBob at bigfoot.com


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