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minimize vs leastsquaresfit not consistant ??

bsimpkins
12-Amethyst

minimize vs leastsquaresfit not consistant ??

hi all,

I'm fitting data to an expression in Prime 2.  i'm formulated the fit using

genfit

leastsquaresfit

minimize (SSE...)

issues:

genfit is fast but I need to implement constraints.

leastsquaresfit is reasonably fast but the results don't quite match the other two methods.

minimize results match genfit but it's wicked slow to converge.

questions

- why is leastsquares not matching genfit or minimize?

- can I speed up minimize?

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