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[emerg]Fitting xyz data to find a,b,c BUT ERROR
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Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2019(64-bit) SR2 Operating System: window 10 [b]Emergency! Help! [xx(][/b] Hi, this is juyeon. I have the following problem: z=a+bx+cy I have a xyz-dataset and i need to find a,b,c parameter. I tried to do 'nonlinear curve fit' by referring to this post and the link to the post is (https://www.originlab.com/doc/Tutorials/Fitting-Datasets) . But, i got some error : Fit did not converge - reason unknow & Fit status code: 27 fit did not converge - reason unknowm. Does anyone know why I got an error?? [b]I think that I do not know how to do a non-linear fitting. Someone tell me how to do it. What I have is xyz-data, and what I need to get is ABC(parameter). z=a+bx+cy[/b] [The settings I used are as follows] -function model: explict - independent variables: x,y - dependent variables: z - parameter name: a,b,c - fuction : z= a+bx+cy [u]Here is the link to my previous-forum-post(THE SAME QUESTION) https://my.originlab.com/forum/topic.asp?TOPIC_ID=47516[/u] Ask me again if there's anything you don't understand. To solve this problem, I am willing to send you the data excel file, original opj file, or fit function file by email. Or, I would appreciate it if someone could tell me [b]how to ask the original lab-tech directly.[/b] I'll be waiting for your answer. Thank you. I'm in a hurry. This problem is killing me. This problem is an emergency for me. Give me an answer me ASAP. leejuyeon
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