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Re: st: finding a peak in an asymmetric curve

From   Yoshiro Nagao <>
Subject   Re: st: finding a peak in an asymmetric curve
Date   Wed, 12 Apr 2006 08:53:03 +0900 (JST)

Dear Maarten, Ron, Joseph,

Thank you very much for the
useful commands and solutions.

I will learn how to do it
and try it.

> I'm not sure what the "significance" of a peak is,
> and I notice that  
> you have rather shyly surrounded it with quotes.
> What exactly do you  
> want to find out about the peak.

What I would like to show:

(1) whether the curve is really rising up and 
 fallind down, instead of monotonously 

(2) whether the "x" (not "y") for the peak
   is significantly different, 
   when there are two or more of such curves,

Indeed there are some mathematical models
but, when I tried to apply them by "nl",
they did not converge.


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