clear all
t=0:0.0001:1;
f1=2*t.^3-3*t.^2+1;
f2=-2*t.^3+3*t.^2;
f3=t.^3-2*t.^2+t;
f4=t.^3-t.^2;
m1=max(f1);m2=max(f2);m3=max(f3);m4=min(f4);
plot(t,f1,'r',t,f2,'c',t,f3,'m',t,f4,'b')
hold on
text(0.04,0.9,'f1max=1')
text(0.9,0.9,'f2max=1')
text(0.35,0.2,'f3max=0.1481')
text(0.6,-0.09,'f4min=-0.1481')
 ylabel('t')
xlabel('Hermite 曲線的調和函數')