说明: function [varargout]=ellipsefit(x,y) %ELLIPSEFIT Stable Direct Least Squares Ellipse Fit to Data. % [Xc,Yc,A,B,Phi,P]=ELLIPSEFIT(X,Y) finds the least squares ellipse that % best fits the data in X and Y. X and Y must have at least 5 data points. % X
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