homographic interpolation of experimental data point
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I have a theoretical and practical problem.
I want to do interpolation using this homographic function y = (ax + b)/(cx + d) of some experimental data, in order to find the coefficient a, b ,c ,d.
I know that if I want to do a polynomial interpolation, I need to use polyfit, but I cannot use this for this homographic function
I am trying to search how to do that, but I didn't find anything, can you help me?