说明：  使用1-12阶多项式拟合算法对光谱数据拟合，从而达到预测红边位置及其反射率的目的，并以均方根误差RMSE和决定系数R^2为精度检验参数，比较各阶拟合效果，确定本次实验最优的拟合阶数，以期达到最佳预测。
(Using 1-12 order polynomial fitting algorithm to fit the spectral data, so as to achieve the purpose of predicting the position of red edge and its reflectivity. Taking RMS error RMSE and decision coefficient R ^ 2 as precision test parameters, comparing the fitting effect of each order, determining the best fitting order of this experiment, in order to achieve the best prediction)