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[求助] 求教用matlab做复变函数的非线性回归分析

待拟合的函数y=beta(1)-beta(2)^2/(x*(x+i*beta(3)));

x=[1.57079632679490e+15
1.71359599286716e+15
1.88495559215388e+15
1.92342407362640e+15
1.96349540849362e+15
1.98416378121461e+15
2.00527190654668e+15
2.04886477408030e+15
2.09439510239320e+15
2.14199499108395e+15
2.19180882808590e+15
2.21759481429868e+15
2.24399475256414e+15
2.29872633189497e+15
2.35619449019234e+15
2.41660973353061e+15
2.48020472651826e+15
2.51327412287183e+15
2.54723728669443e+15
2.61799387799149e+15
2.69279370307697e+15
2.77199351787335e+15
2.85599332144527e+15
2.89993168023673e+15
2.94524311274043e+15
3.04025095508690e+15];


y=
[1.57079632679490e+15
1.71359599286716e+15
1.88495559215388e+15
1.92342407362640e+15
1.96349540849362e+15
1.98416378121461e+15
2.00527190654668e+15
2.04886477408030e+15
2.09439510239320e+15
2.14199499108395e+15
2.19180882808590e+15
2.21759481429868e+15
2.24399475256414e+15
2.29872633189497e+15
2.35619449019234e+15
2.41660973353061e+15
2.48020472651826e+15
2.51327412287183e+15
2.54723728669443e+15
2.61799387799149e+15
2.69279370307697e+15
2.77199351787335e+15
2.85599332144527e+15
2.89993168023673e+15
2.94524311274043e+15
3.04025095508690e+15];
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