| T O P I C R E V I E W |
| hmzahb |
Posted - 03/06/2024 : 7:37:28 PM
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2024
Operating System: Windows 11
Hi, I am trying to do a fitting for the data bellow but it gives me the error message, so I am not sure is the fitting acceptable or in general how can I find the best fitting for this curve ?
1423.59 21.95
1430.57 11.18
1449.69 7.69
1481.98 3
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| 3 L A T E S T R E P L I E S (Newest First) |
| easwar |
Posted - 03/12/2024 : 10:07:57 AM
Hi hmzahb,
The function you chose initially (ExpDecay1) is the right one, as your data has an offset in X.
But note that this function has 4 parameters and you only have 4 data points, thus you have no degrees of freedom to perform the fit.
Try fixing the x offset parameter to the x value of the first data point, and you will get better results.
Easwar
OriginLab |
| hmzahb |
Posted - 03/07/2024 : 05:32:56 AM
Thank you, I did but it seems didn't works well
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| Shirley_GZ |
Posted - 03/07/2024 : 02:07:58 AM
Hi hmzahb,
Please use the function "ExpDec1" instead, in which the parameter x0 and A1 are not independent.
https://www.originlab.com/doc/Origin-Help/ExpDec1-FitFunc
Thanks,
Shirley
Originlab Technical Service Team |
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