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Gamma Variate Curve Fitting [message #35516] Mon, 16 June 2003 09:05
faeriepunk is currently offline  faeriepunk
Messages: 6
Registered: May 2003
Junior Member
I have been trying for a week now to fit data to a gamma variate curve
using the curve fitting algorithms built into IDL. Every time I use
CurveFit it tells me my data does not converge and every time I use
SVDFIT my program crashes and exits out of IDL automatically! I made
sure that my inital guesses were VERY close to the actual test data I
am using and I'm still stuck. Does anyone have any experience fitting
this type of non-linear curve using IDL? If I was using anything else
I would probably use the simplex method but there doesnt' seem to be a
downhill simplex curve fitting algorithm in IDL. HELP!!!

Kate Morgan
Medical Imaging Research Technician
University of Toronto

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