光谱预处理特征提取建模一系列方法，matlab适用

%y=plot(Y1); %hold on figure; % 新建一个图形窗口 plot(wave,day1,'k','LineWidth',1); hold on; %黑色实线，线宽为2 xlabel('Wavelength'); ylabel('Reflectance'); % 为X轴和Y轴加标签 output1 = smoothts(day1,'e',30); %output2 = smoothts(day1,'e',60); plot(wave,output1,'b','LineWidth',1); hold on;% 绘制平滑后曲线图，黑色实线，线宽为2 %plot(wave,output2,'r','LineWidth',1); hold on; legend('原始散点','平滑曲线(窗宽30,标准差0.65)',... '平滑曲线(窗宽60)','location','northwest');