Difference in NLSQ-Fit between LV7.0 and 7.1

[Jayzon]

Hi,

I'm using a levenberg-marq fit to analyse some spectra. the fit works well under LabV 7.0 but not under LabV 7.1. when i searched for the error i found, that the "get new coefficience"-subVI delivered different results. for example under Version 7.0 the result for the input 1,0 / 1,0 / 1,0 / 0,1 for coeff/Beta/Alpha/Lamda was 1,83 while Version 7.1 showed 1,91.

Does anyone has an idea how to fix this problem?

Thanks in advance

[Matthieu Papaux]

Hi Jayson,

Your are right there is a known problem in Labview 7.1.

You must just replace the get new coefficients.vi located in program\National Instruments\Labview 7.1\vi.lib\analysis\6fits.llb/ with the "Get New Coefficients.vi" attached under.

Let me know if that resolved your problem.

Best Regards

Matthieu Papaux
NI Germany

[Jayzon]

It works fine now!

Thanks alot for your help