Least Squares Method for best line fitting
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Tharindu Weerakoon
le 26 Fév 2015
Commenté : Tharindu Weerakoon
le 27 Fév 2015
I have a set of X and Y coordinates data taken from Laser scanning
X=[x1 x2 x3 x4 .....] Y=[y1 y2 y3 y4 .....]
Elements of both the X and Y include some errors.
I tried to find the best fitting line using polyfit and polyval command in matlab, but it can use only to calculate the Yhat w.r.t. X data.
At the end it will give X and Yhat only.
If I want to know calculate both the Xhat and Yhat, how can I use polyfit and polyval ?
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Torsten
le 26 Fév 2015
I think you are talking about "orthogonal linear regression".
Try
Polyfit is not suited for this kind of Fitting ; it assumes there are no errors in the independent variable.
Best wishes
Torsten.
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