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Potasio39
Argentina
1 Posts |
 Posted - 09/12/2018 : 5:01:49 PM
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Hi, i created a User Defined Function for Non Linear Fitting but i can't make the fitted curve not to start from (0,0). i need to fit my data to the Avrami model, starting from low values that rise until they reach a plateau. the problem is that even when my first points (at (0,y)) are higher than y=0, the fitted curve always starts from (0,0) and not from the y initial value 
please, i will appreciate so much any clue about this!! 
kind regards,
potasio
Origin v8.0724 (B724)
Operating System:Windows 7
potasio39 |
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JacquelineHe
287 Posts |
Posted - 09/12/2018 : 11:30:43 PM
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Hi,
If you want your fitted curve through the point at (0,y), I suggest you can refer to this tutorial:
https://www.originlab.com/doc/Tutorials/Fitting-FixThroughPoint
And the second method "Use Linear Constraint", I think it is more suitable for your problem.
Thanks
Jacqueline
OriginLab |
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UserDef NL Curve