Can curve hold functions defined Isoquant handful of VI?

I'm trying the curve Fit VI non linear (Constrained) to analyze a step response.  Is it possible to define a parameter to adapt to a change in the weather?  In this way, I won't so ensure to get the precise start of the analysis window.  For example y = f (x (t - t0), a = [a0, at1]) or y = f (x (t), a = [a0, a1, t0])?  It requires an IF (case report) inside the function.  You can do this in Excel, so I thought that LabVIEW could do it too.  See attached simplified example of a linear adjustment deferred in time.  It gives the error-20041 occurred at NI_Gmath.lvlib:Nonlinear Curve Fit LM.vi:1. Possible reasons: analysis: the system of equations can be solved because the input matrix is singular.

Kind regards

Try this instead. Seems to work very well.

Tags: NI Software

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