請問如圖二元方程組 如何用matlab編程實現繪圖。。

clear

x1=linspace(0,0.1,10);

y1=polyval([-2.258 11.55 -17.7 16.02],x1);

x2=linspace(0.1,1.6,10);

y2=polyval([-1.8064 9.24 -14.16 12.816],x2);

x3=linspace(1.6,3,10);

y3=polyval([0.9904e-3 9.24 -0.12504 1.9336 3.5848],x3);

x4=linspace(3,74,100);

y4=1.8*exp(1.53e-4.*x4.^2-0.0305.*x4+2.952);

x5=linspace(74,100,100);

y5=13.9*10.^(-0.003.*x5);

plot(x1,y1,x2,y2,x3,y3,x4,y4,x5,y5)

按上面語句試試