How to use least squares fit with bisquare weights
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I am trying to fit a line/curve to a plot that looks quite noisy. I think it looks like a straight line or a very light curve. I read about least squares fitting with bisquare weights and I am trying that http://www.mathworks.com/help/curvefit/least-squares-fitting.html
Problem is I think the sample code doesnt provide the sample for the bisquare weights so im quite confused as to how I can implement it.