[Gnuplot-info] 3-d-fitting

[Spinora <N.M...@gm...>]

Hi
I have data with 3 values: x,y and z and I would like to fit f(x,y) to it. I
read in the help that the usual fit-function could do the job but when i
actually try it the fitted function in nowhere near my data.
I've tried differnt functions and they all seemed to fail in different ways:
one kept quitting after 2 iterations, giving back the starting values, one
did about 15 Iterations and gave back something far from the starting values
but even further from the data, one kept giving back a nearly flat plane
(which is pretty wrong) but at least it seemed to be at the average of the
data.
>From this variety of errors I was unable to find out what went wrong, hope
someone can help me here.

cheers
Spinora
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