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I have one-dimensional x, y, and z arrays, with x & y being positions
(independent variables), and z being an array of dependent variable
values. All 3 arrays have the same number of elements.

I'd like to fit a function of two variables (a plane) to the
data, and I've been trying to use MPFIT2DFUN. It seems I have to make
the x & y arrays into 2-d arrays, but I am not clear as to why or how.
Can someone fill me in?


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