1、x0 =30:5:60;y0 =-64 -171 -262 -363 -454 -545 -637;p=polyfit(x0,y0,1);x1=min(x0);x2=max(x0);x=x1-1:0.01:x2+1;y=polyval(p,x);p;s= p(:,1);s=abs(s)y1=polyval(p,x0);l1=abs(y0-y1);l2=max(l1);y2=abs(y0);yfs=max(y2);rl=l2./yfsplot(x0,y0,ro,x,y,k-,LineWidth,2,MarkerSize,8);legend(x0-y0,x-y)发光二极管照度实验光敏电阻性实验数据
2、处理程序x0 =0 10 20 30 90 100%照度y0 =0 0.15 0.25 0.34 0.87 0.97;%电流、电压 或光电流 做三图xm=max(x0)x=0:0.1:xm;y=interp1(x0,y0,x,spline);plot(x0,y0,ro,x,y,b-,LineWidth,3,MarkerSize,8);legend(x0-y0,x-y)x0=0:2:10;%电压y10 =0 0.16 0.25 0.49 0.66 0.83%10Lx 光电流y20 =0 0.35 0.72 1.15 1.55 1.95% 50Lx 光电流y30 =0 0.6 1.21 1.82 2.44 3.06% 100Lx 光电流x=0:0.1:10; y1=interp1(x0,y10,x,spline); y2=interp1(x0,y20,x,spline); y3=interp1(x0,y30,x,spline);plot(x0,y10,bo,x0,y20,ko,x0,y30,ro,x,y1,b-,x,y2,k-,x,y3,r-,LineWidth,3,MarkerSize,8);gtext(10lx);gtext(50lx);gtext(100lx);legend(x0-y0,x-y1,x-y2,x-y3)
