Matlab fsolve changes in 2012a version
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Here's what the R2012a Release Notice says about fsolve
:
Levenberg-Marquardt algorithm
The fsolve, lsqcurvefit and lsqnonlin modes no longer use the Levenberg-Marquardt regularization parameter value like, so they no longer return the -3 exit flag when using the levenberg-marquardt algorithm. Instead, they use TolX tolerance in all internal calculations.
http://www.mathworks.com/help/toolbox/optim/rn/bs86_xz.html#btd80ns
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