MATLAB: Exclude points in a surface fit with lsqcurvefit

curve fittingMATLAB

Hi,

Is it possible to exclude points in a 2-D fit when using the function lsqcurvefit?

If it is possible, what syntax could I use to achieve this?

Thanks, David

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If anyone is interested how I solved this: I used the "fit" function instead and created a weighting function where I weighted my excluded points with 0 and my non excluded points with 1.

I'm not sure now why I was using "lsqcurvefit" at all...

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Best wishes

Torsten.

MATLAB: Lsqcurvefit

Since the distance between two complex numbers a+i*b and c+i*d is (a-c)^2 + (b-d)^2, you could treat each complex number as a pair of independent real numbers. Wrap fun in a function rfun that returns the real and complex parts of the output. For example, assuming rfun returns a column vector,

function y = rfun(x)
  y = rfun(x);
  y = [real(y); imag(y)];
end

Similarly, you could replace ydata by

rdata = [real(ydata); imag(ydata)].

Then you have the first two inputs for lsqcurvefit.

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