poly fit warning when drawing vertical curves
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Im trying to draw quadratic curves using polyfit function on points that is almost vertical to illustrate a particular shape. eg across points (0,0) (1,5) (0,5) Obviously it would generate warning for having 2 identical x coordinates, is there any alternative I can use to avoid the warning without changing the coordinates of the points? Or is there other functions available to do that?
Thanks
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Answers (1)
Walter Roberson
on 10 Jan 2016
No. If you have duplicate x coordinates then that is not a polynomial curve. It might be a rotation of a polynomial but not a polynomial.
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Walter Roberson
on 10 Jan 2016
Exchange your x and y coordinates, fit that, polyval(), exchange back
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