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Fitting 4 or more exponential kinetics data

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gdasilva

2 Posts

Posted - 01/29/2014 : 1:30:35 PM

Greetings all, just switched from sigmaplot to Origin v9.1.

I have some complex kinetics data that includes exponential rise and fall with greater than 4 (4-6 exponents)exponents within one time trace. what is the most straight forward way of fitting the data? I think 3 exponentials is the largest number available in the standard function library. Thanks.

zahraa

USA
52 Posts

Posted - 01/29/2014 : 2:33:15 PM

Hi Giordano,

The standard function library has a vast array of functions but you can also build your own functions by going to Tools: Fitting Function Builder. Here you can follow the same format as the 3 exponent built-in function to create a 6 exponent fitting function of your own. Some helpful resources can be found here:
http://www.originlab.com/www/helponline/origin/en/UserGuide/User-Defined_Fitting_Functions.html
http://www.originlab.com/index.aspx?go=Products/Origin/DataAnalysis/CurveFitting/FittingFunctions&ss=chm&pid=1172

If you run into any difficulties you can send your data with details of the problem to tech@originlab.com.

Edited by - zahraa on 01/29/2014 2:34:14 PM

gdasilva

2 Posts

Posted - 01/29/2014 : 3:00:58 PM

Thank you. I will get working.

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