Abstract A matrix-calculation method for evaluating the uncertainty of the polynomial fitting data is derived and the properties of this method are studied by simulation. Based on this, the optimal fitting order can be obtained with minimum fitting uncertainty. The optimal fitting order obtained in the simulation is the same as that of the original function of the simulation model. Hence, the effectiveness of this method is verified.
XU Jin-xin,YOU Qiang. Uncertainty Calculation for Arbitrary Order Polynomial Least-square Fitting and Analysis of the Best Fitting Order[J]. Acta Metrologica Sinica, 2020, 41(3): 388-392.
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2020, Vol. 41 
