[SciPy-user] optimization question

Lin Shao shao@msg.ucsf....
Tue Jul 3 17:34:33 CDT 2007


Can't you express c(x) and d(x) as functions in terms of x? If so,
then I assume you'll get a bunch of scalar parameters c1,c2... for
c(x) and d1,d2,... for d(x). Then what you need is to fit
(a,b,c1,c2...,d1,d2...) using your measured data and known x_i.

scipy.optimize.leastsq is a good choice. But for some reason, the
Jacobian matrix has to be "column major" (each column represents one
observation point) and set col_deriv to 1. Otherwise it won't work. I
reported this bug weeks ago, but nobody seems to have answered with
authority that if it's a bug or not.


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