Non-linear Least Squares Analysis

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#74

From: f0975893
Date: Wed, 04 Nov 1992 07:45

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I am currently trying to fit some NMR relaxation data to a theoretical
equation. The equation is a complicated exponential relation with three
(or six) unknown coefficients (depending on how many correlation times
I include). 

I wondered if anyone knew of any software to perform a non-linear least
squares analysis to fit the equation to my data, and provide me with the
best fit values of the coefficients. I does not have to generate fancy
graphical output (though that would be nice). A simple numerical analysis,
given the equation and data, with output of the calculated data values
and coefficients along with their standard deviation errors, would suffice.

I have access to VMS (VAX), UNIX (SGI), MS-DOS (with Windows), and 
Macintosh systems (I think that covers most eventualities!!). I also
have ftp access, so I can download the source or compiled code.

Thanks in advance,
-Richard.
  _\_   Richard J Appleyard  f0975893@jaguar.csc.wsu.edu
 /   \  Washington State University  
(   ) ) Voice (509) 335-7728  Fax (509) 335-9688 
 \___/  "To err is human, but to really screw things up takes a computer!"

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From: f0975893@jaguar.csc.wsu.edu
Newsgroups: sci.math.num-analysis,sci.math
Subject: Non-linear Least Squares Analysis
Message-ID: <1992Nov4.154529.1@jaguar.csc.wsu.edu>
Date: 4 Nov 92 07:45:29 GMT
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