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Re: integration using Quad or Simpsons 1/8th or Trapezoid of a data file


From: Hendrik Naumann
Subject: Re: integration using Quad or Simpsons 1/8th or Trapezoid of a data file!!
Date: Thu, 1 Nov 2001 11:36:30 +0100

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An small addition.

>  On the other hand, if it isn't highly
> accurate, or you simply want a quick and not necessarily highly
> accurate answer, using quad might be like using a hammer to swat a
> fly, so try this: put your data in a 2xm matrix d, where each row
> of d is an ordered pair (x,y) of your data in abscissa/ordinate
> format.  

The only thing you have to check on this point is that you don't have 
two points with the same abscissa (x-value).  Otherwise you will get 
realy suprising effects. You can check this with the diff function.

For points with the same abscissa you may take the mean of these 
values.

- -- 
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