Hi, I would like to ask about one problem I need to solve. I had found codes for fitting logarithmic spiral and circle with measured data (R. Wicklin). Later I tried to compare these models with my own measured data (short arcs). In some cases, the plots of spiral and a circle (or ellipse) fitted very similar. By reading the programmes for spiral and a circle I realized that the codes optimize data in a different way. I would like to know if there is a way I could choose the best fitting model (according to the value of the objective function, radius or something else). Thanks Ludek
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