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 automation of curve fitting		  New Topic  Reply to Topic
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ph7klw

Malaysia
Posts
Posted - 10/11/2007 :  02:16:06 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (Select Help-->About Origin): Origin 7.5
Operating System: XP

I have thousands of data to be fitted. I have defined my user-denifed fuction called SED in the Origin. Now I want to do curve fitting via automation and extract the parameters in Origin.c The code is like
"#include <Origin.h>
////////////////////////////////////////////////////////////////////////////////////
void test()
{
nlsf.func$ = SED; // select SED fitting function
L0 = 1000; //initialize parameter values
tau = 1000;
beta = 0.5;
nlsf.cleanUpFitData();
nlsf.fitdata$ = b;
nlsf.iterate(20);
nlsf.xmode = 2;
nlsf.funcx$ =A;
nlsf.funccol$ = B;
nlsf.makecurve(func);
}
"
But i dont know why I get error below
C:\.....\OriginC\SED.cpp(26) :Error, Variable "SED" not declared
C:\.....\OriginC\SED.cpp(26) :Error, general compile error
C:\....\OriginC\SED.cpp(23) :Error, error(s) found in compiling function test

any recommendation is welcome

Mike Buess

USA
3037 Posts
Posted - 10/11/2007 :  07:05:13 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
1. You must define nlsf with using nlsf = LabTalk.NLSF.
2. Parameter names cannot be used in OriginC. Use nlsf.pn instead.
3. All strings must be quoted.
4. Values of nlsf.fitdata$|funcx$|funccol$ must be full dataset names.

void nlsf_test()
{
using nlsf = LabTalk.NLSF; // define nlsf
nlsf.func$ = "SED"; // select SED fitting function
nlsf.p1 = 1000; //initialize parameter values
nlsf.p2 = 1000;
nlsf.p3 = 0.5;
nlsf.cleanUpFitData();
nlsf.fitdata$ = "dataset name"; // full dataset name
nlsf.iterate(20);
nlsf.xmode = 2;
nlsf.funcx$ = "dataset2 name";
nlsf.funccol$ = "dataset3 name";
nlsf.makecurve("func");
}

Finally, you can use the MultiFit addon module to fit multiple curves from the same graph or worksheet or collect the parameters for multiple fits in one worksheet.

Mike Buess
Origin WebRing Member
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