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 scripting: how to fit all graphs by exp + gauss?		  New Topic  Reply to Topic
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sshkrv

USA
4 Posts
Posted - 07/02/2014 :  11:15:42 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hello, I got this graphs to approximate them exponentially in region from 600 nanometers(just a tail).
It also contains a gauss(exp+gauss, finally). I have to write a script(or do it manually) that approximates each graph(I've got a lot of them) by a gauss+exp. The problem is that each coefficient(halfwidth, peak, decay and etc) changes in time and I don't get what is going on with exp decay coefficient. Thanks for attention!

ssh

lkb0221

China
497 Posts
Posted - 07/08/2014 :  11:07:24 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Your data is simply Exp and Guass added together?
You can build a user-defined fitting function to fit your data if this is the case.
http://www.originlab.com/doc/Tutorials/UserDef-FitFunc
http://www.originlab.com/doc/Quick-Help/UserDefinedFittingFunction

Zheng
OriginLab
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