Hello Ruud,
I apologize for the delayed response.
I am not aware of the curve fitting taking longer in LabVIEW 7. LV 7
is, however, threaded differently than LV 6.1. This may result in
some differences.
Another thing to consider is that the speed of the curve fitting is
highly dependent on you
Matthew,
Another thing that strikes me is that the actual fitting in LV7 takes
*way* longer than in LV6.1. Is that a known thing?
Regards,
Ruud
Thank you very much! This solution indeed helps! Any idea why I am
only having this problem in LV7 and not in LV6.1?
Regards,
Ruud
Ruud,
Thank you for contacting National Instruments.
The problem does in fact have to do with the very small values of Y.
As you mentioned, the solution is to scale the Y values, perhaps by
multiplying them by 10^+8. The following link will take you to a
knowledge base article that will give you
I wrote an application that does Levenberg Marquardt fitting on a
measured power spectrum (that should be a lorentzian). In LV6.1 this
application worked perfectly. Even if the initial guess coefficients
were very different from the actual coefficients, the algorithm would
find the right values.
Re
