VI LabView 2014 exponential Fit does not return an offset

Hello world

I use LabView2014 and that you want to adjust an exponential curve as A * exp (B * x) + C with VI 'exponential Fit'. In all cases, the VI returns C = 0 and attempts to correct this error by using the bad A and B, which of course gives bad results. Any ideas? I have attached my VI.

Thanks in advance,

Aaronski

You must give a better estimate for the parameters of adjustment or to give a tighter tolerance.

Right now the default on the maximum offset is set to zero, and your tolerance is set to 0.0001. When you arrive at the large exponential, the algorithm stops because it meets the tolerance soon enough.

EDIT: Try to reduce your ramp so that you use not e ^ 100 in your editing. For numbers that big, even using epsilon machine as tolerance will result in satisfactory adjustment of tolerance with a pretty crude pass. You can also try to reduce the weight of the extremely large numbers of adjustment.

Tags: NI Software

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