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 Nonlinear Curve Fit		  New Topic  Reply to Topic
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Lathpandura

USA
2 Posts
Posted - 08/11/2022 :  10:40:27 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version and Service Release: OriginPro 9.0.0 (64-bit) SR2 b87
Operating System: Windows 10

Hi All;

I was wondering how to fit a curve for the 2D data given below. Those data from a spectrum (Normalized Counts vs. Energy). I was trying to use "nonlinear curve fit"using "Levenberg-Marquardt algorithm". I tried different options in the tool and I had no luck. The final curve fitting should be similar to image I attached from an article. Any advice regarding this highly appreciated. Thank You!





Best Regards;

Lakshitha

YimingChen

1644 Posts
Posted - 08/11/2022 :  10:57:20 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Do you know what fitting function to use for the fitting? From the image, it looks like a multiple peak fitting with background subtraction. If that's the case, you will need to use the Peak Analyzer tool. Thanks.
https://www.originlab.com/doc/en/Tutorials/PeakFitting-Baseline

James
Edited by - YimingChen on 08/11/2022 10:57:48 AM
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