T O P I C R E V I E W |
sol708 |
Posted - 08/07/2015 : 5:20:18 PM I am planning to create a user defined fitting function for the association and dissociation curves To make a fitting of the first part of curve I have to use the following function 1 (Association):
y = Aeq * ( 1 - exp(- Kobs *t), where
t is independent parameter, and Kobs, Aeq(Equivalent Signal) - parameters to be determined.
Once I get the values for these parameters , I have to use them for another fitting of the 2nd part of curve (function2 Dissociation):
y2 = Astop* exp( -Kdiss* ( t - Tstop ) );
where Astop = Aeq * ( 1 - exp(- Kobs *Tstop) ).
Is there any one can help me in creating a user-defined fitting function to get these Kd and Aeq values from function1 and use them automatically in the function2? Thanks Sol |
1 L A T E S T R E P L I E S (Newest First) |
SeanMao |
Posted - 08/11/2015 : 03:00:44 AM Hi,
You can create a piecewise function and directly use it to fit your data. Please refer to this page for step by step tutorial: http://www.originlab.com/doc/Tutorials/Fitting-Piecewise
Alternatively, you can rearrange these two segments into different columns and global fit them with Kobs, Aeq as shared parameters: http://www.originlab.com/doc/Tutorials/Multi-Functions-Global-Fitting
Regards!
Sean
OriginLab Tech Service |
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