| T O P I C R E V I E W |
| basarir |
Posted - 01/30/2007 : 11:54:39 PM
Origin Version (Select Help-->About Origin):7 SR4
Operating System: Windows XP
Dear all,
Is there a way to fit two datasets to two different functions with shared parameters using the nlsf?
My functions are:
phi_real = (f_0^2-f^2)/ sqrt( (f_0^2-f^2)^2 + (f*f_0/Q)^2 )
phi_imag = -f*f_0 /Q / sqrt( (f_0^2-f^2)^2 + (f*f_0/Q)^2 )
where f is the same array for both of the datasets and phi_real and phi_imag are the dependent variables. f_0 and Q are the shared parameters. I can fit my data to each of these functions using NLSF independently but can I run NLSF simultaneously for both, such that I get one f_0 and one Q which are the best minimizations for both of the functions ?
Thank you,
Onur |
| 2 L A T E S T R E P L I E S (Newest First) |
| basarir |
Posted - 02/01/2007 : 09:18:45 AM
Hello Zachary,
It worked!
Thank you,
Onur |
| zachary_origin |
Posted - 01/31/2007 : 03:09:42 AM
You can define a function with phi_real, phi_image as Dependent Var and f, f_0,Q as Independent Var.
Then to do the fitting, select Action: Dataset to set the datasets for phi_real and phi_image properly.
Zachary
OriginLab Technical Services.
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