Try PeakFit from Seasolve.com, it will perform your fitting in seconds
with no programming required.
-Joel
curve wrote in message news:<5065000000080000006BCA0000-1079395200000@exchange.ni.com>...
> Can I do Lorentzian curve fitting with labview 4? The formula for
> Lorentzian fitting is y=k0+k1/((x-k2)^2+k3).