| T O P I C R E V I E W |
| bababhai |
Posted - 04/28/2016 : 03:24:47 AM
Origin Ver.8 and Service Release (Select Help-->About Origin):
Operating System:windows
As shown in the image, I would like to fit one function to the data-set up to particular independent variable (x value), and also simultaneously fit other function to rest of the x values such that I get parameter values which will give reasonable fit for both function.
bubu |
| 3 L A T E S T R E P L I E S (Newest First) |
| bababhai |
Posted - 05/11/2016 : 05:23:23 AM
Thank you AmandaLu for the help.
Hope this will work.
Thanxx :D
bubu |
| AmandaLu |
Posted - 05/10/2016 : 06:13:52 AM
Hi bubu,
To ensure the two functions are consecutive at the intersection point, you will need to take the coordinates of the intersection (x_1, y_1) as parameters. So the two functions are transformed as follow:
Y = A*X+(y_1-A*x_1)
Y = y_1-exp(A*x_1/B)+exp(A*X/B)
If you already know x_1 value, you can fix it during fitting.
BTW, we will make an APP of fitting with piecewise function.
Thanks,
Amanda
OriginLab Technical Service
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| AmandaLu |
Posted - 04/28/2016 : 04:38:55 AM
Hi bubu,
We have a tutorial of how to fit with Piecewise Functions:
http://www.originlab.com/doc/Tutorials/Fitting-Piecewise
Thanks,
Amanda
OriginLab Technical Service |
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