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MathGroup Archive 1997

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Re: Anti-Chop Function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg5833] Re: [mg5813] Anti-Chop Function
  • From: Francisco Edmundo de Andrade <edmundo at lia.ufc.br>
  • Date: Tue, 28 Jan 1997 03:42:57 -0500
  • Sender: owner-wri-mathgroup at wolfram.com

On Wed, 22 Jan 1997, Mathew J. Binkley wrote:

> The Chop[Data, Min] sets all values in Data that are < Min equal to 0.  Is 
> there an equivalent function that will take all values in Data that are > 
> Max and set them equal to 0?  I'm trying to eliminate the DC components 
> of a Fourier transform, and the only way I've been able to do it to date 
> is buy manually Delete[]-ing the first value and Insert[] -ing 0.
> 
> 
> Mat
> ---
> Mathew Jason Binkley - Astronomy TA  | "It was the dawn of the Third Age 
> Wake Forest University - Olin 304    |  of mankind, the year the Great
> Phone: (910) 759-4957                |  War came upon us all."
> WWW:   http://www.wfu.edu/~binklmj5/ |  - John Sheridan, Babylon 5
> 
> 

Dear Mathew,

If you define a function maxChop as follows:
   maxChop[v_,max_]:=If[v>max,0,v]
You will get the wanted result, for example:
    maxChop[300,100] gives 0
and maxChop[30,100] gives 30

I hope this help you.

With kindest regards,

Edmundo

(Edmundo's contribuitions 1997)
Universidade Federal do Ceara
   Fortaleza - CE - Brasil



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