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T O P I C R E V I E W
cfenoglio	Posted - 07/03/2018 : 07:09:59 AM Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 8 v8.0724 Operating System: Windows 7 Hi! Im new to origin, want to fit my data to this equation but always get de fit dont converge message y = y0exp(-kdt)+yprekf(exp(-kdt)-exp(-kft))/(-kd+kf) y: dependent variable t: independent variable parameters: y0, ypre, kd, kf
2 L A T E S T R E P L I E S (Newest First)
cc261	Posted - 09/01/2018 : 06:12:28 AM try a software named 1stOpt, no guess of initial parameters is required.
arstern	Posted - 07/03/2018 : 08:54:30 AM Hi, I would recommend checking your parameters. Make sure that the values in the initial parameters makes sense. Here is some documentation as well on why a fit does not converge: https://www.originlab.com/doc/Origin-Help/The_Reason_Why_Fail_to_Converge https://www.originlab.com/doc/Origin-Help/NLFit-Result-FitStatusCode Aviel OriginLab

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