| T O P I C R E V I E W |
| agarna78 |
Posted - 05/25/2005 : 11:31:01 AM
Origin Version Pro 7:
Operating System:Windows 2000
Hello:
I want to know how to introduce a new function to do a non linear fitting, introducing in the function values of colums in the a data sheet.
Thanks |
| 3 L A T E S T R E P L I E S (Newest First) |
| greg |
Posted - 06/20/2005 : 3:16:30 PM
Try following Leo's suggestion. With a function such as :
y = p * Var1 * x;
all symbols are merely placeholders which are either parameters to be evaluated in the fit or variables to be passed to the fitter.
When you use the function, you would assign scalar value estimates to the parameters and datasets (columns) to the variables, so that during function evaluation the above equation might be treated as :
col(C) = p * col(A) * col(B);
Try reading some of the tutorials or viewing the multimedia files.
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| agarna78 |
Posted - 06/03/2005 : 07:40:17 AM
No, my question was how to make the new function that I can create, dependet of a set of values in the colums of a datasheet. For example, a function could be
y=p*col(A)*x
where p is the parameter to adjust and col(A) are the discretes values of the column A corresponding to each value of x.
Thank you very much.
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| Leo_Li |
Posted - 05/26/2005 : 01:06:56 AM
Origin menu: Analysis->Nonlinear Curve Fit->Advanced Fitting Tool. Or press "Ctrl+Y". This brings up the "Nonlinear Curve Fitting" dialog.
This dialogbox integrates all non-linear curve-fitting functions and is user configurable.
In the dialogbox, select menu: Function->New. Then input your own formula. All input fields have self-explanatory names. You can also press F1 for help.
Pls post again if there is any further question.
Leo
OriginLab |
