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MathGroup Archive 2007

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Re: Log of y-axis data?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg81010] Re: Log of y-axis data?
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Fri, 7 Sep 2007 02:15:52 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <fbojsv$jg0$1@smc.vnet.net>

efifer at fas.harvard.edu wrote:

> I was wondering if someone could help me create a graph that takes the Log of
> the y-axis data (which is Fourier of my data list). To clarify....
> 
> My original graph is as follows:
> 
> ListPlot[Log[Abs[Fourier[
>     data]]], PlotJoined -> True, PlotRange -> {{0, 10000}, {0, 5}}]
> 
> Where data is :
> 
> data = Table[Sum[ampout[i]*Sin[(2.*&#960;*freq[i])*t], {i,
>         1, 18}], {t, 0, 1, .0001}]

I believe that what you are looking for is the function 
*LinearLogListPlot*, for version 5, or *ListLogPlot*, for version 6. For 
instance,

(* Mathematica Version # < 6.0 *)
Needs["Graphics`Graphics`"]
LinearLogListPlot[10^Range[10], PlotStyle -> PointSize[0.02]];

(* Mathematica Version # >= 6.0 *)
ListLogPlot[10^Range[10], PlotStyle -> PointSize[0.02]]

-- 
Jean-Marc


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