Re: optim leasqr with more than one independent variable

[Francesco Potortì]

>Can you give an example of how to use leasqr function in optim with a
>function that has more than one independent variable?
>
>I have searched online, and cannot find any examples of how to do it.

Stephen,

don't have the time to do it right now, but here are instructions:

- start from the one-dimensional problem at
  
http://www.krizka.net/2010/11/01/non-linear-fitting-using-gnuoctave-and-leasqr/,
  where a linear function is used: try it and verify that it works for
  you

- substitute the 1-D linear function with something else in 2-D, for
  example a 2-D Gaussian, or the sombrero() function which is part of
  Octave

- see if you can make the example work with the new 2-D function and
  come back here with details if you don't manage

- It would be very nice if, after creating your example, you wrote an
  example page in the Octave wiki for the leasqr function

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