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66de250

China
32 Posts
Posted - 05/11/2025 :  8:43:20 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
How to create a new differential equation fitting function using Origin (as shown in the figure), and use a scripting language to perform global fitting on multiple sets of data (four sets of data, respectively in the first to the fourth workbooks, each workbook has two columns, the first column is the independent variable and the second column is the dependent variable), to obtain the values fitting A and b.
Edited by - 66de250 on 05/11/2025 8:44:50 PM

YimingChen

1651 Posts
Posted - 05/12/2025 :  09:07:48 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Please use this app to create the differential fitting function, make sure it can fit one of your datasets.
https://www.originlab.com/FileExchange/details.aspx?fid=500

Then you can refer to this page on global fitting with LT.
https://www.originlab.com/doc/LabTalk/examples/Curve-Fitting#Global_Fit_with_Parameter_Sharing_on_Plot_Segments

James
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