matlab如何标记曲线中的一点,如何标注已知曲线的点？

clc

clear

t0=0;

t1=2.5;

t=t0:0.1:t1;

q1=-0.3013*power(t,3)+8.3546;

t0=0;

t1=3;

t=t0:0.1:t1;

q2=0.4432*power(t,3)-2.2596*power(t,2)-5.6491*power(t,1)+3.647;

t0=0;

t1=3.6;

t=t0:0.1:t1;

q3=0.6917*power(t,5)-5.6873*power(t,4)+11.8226*power(t,3)+1.7293*power(t,2)-7.2402*power(t,1)-21.6704;

t0=0;

t1=2;

t=t0:0.1:t1;

q4=-1.8001*power(t,3)+9.8819*power(t,2)-15.6303*power(t,1)-10.741;

t0=0;

t1=2.5;

t=t0:0.1:t1;

q5=0.1225*power(t,3)-0.9186*power(t,2)+2.2964*power(t,1)-16.8745;

figure(1)

plot([0:0.1:2.5 2.5:0.1:5.5 5.5:0.1:9.1 9.1:0.1:11.1 11.1:0.1:13.6],[q1 q2 q3 q4 q5],'r','linewidth',1.5)

hold on

plot(0,q1(1),'sr')

hold on

plot(2.5,q2(1),'sr')

hold on

plot(5.5,q3(1),'sr')

hold on

plot(9.1,q4(1),'sr')

hold on

plot(11.1,q5(1),'sr')

hold on

xlabel('\itt/s','fontsize',5);

ylabel('关节角\itq/(^。)','fontsize',5);

legend('动臂关节','斗杆关节','铲斗关节',1);

t2=0;

t3=2.5;

t=t2:0.1:t3;

q6=-2.5300*power(t,3)+0.0009;

t2=0;

t3=3;

t=t2:0.1:t3;

q7=12.7259*power(t,3)-18.9752*power(t,2)-47.4380*power(t,1)-39.5308;

t2=0;

t3=3.6;

t=t2:0.1:t3;

q8=-11.7287*power(t,5)+103.8784*power(t,4)-263.6126*power(t,3)+95.5582*power(t,2)+182.3108*power(t,1)-9.0217;

t2=0;

t3=2;

t=t2:0.1:t3;

q9=29.3243*power(t,3)-146.0244*power(t,2)+157.4023*power(t,1)-57.7041;

t2=0;

t3=2.5;

t=t2:0.1:t3;

q10=-3.9895*power(t,3)+29.9215*power(t,2)-74.8037*power(t,1)-92.4028;

figure(1)

plot([0:0.1:2.5 2.5:0.1:5.5 5.5:0.1:9.1 9.1:0.1:11.1 11.1:0.1:13.6],[q6 q7 q8 q9 q10],'y','linewidth',1.5)

hold on

plot(0,q6(1),'dr')

hold on

plot(2.5,q7(1),'dr')

hold on

plot(5.5,q8(1),'dr')

hold on

plot(9.1,q9(1),'dr')

hold on

plot(11.1,q10(1),'dr')

hold on

xlabel('\itt/s','fontsize',5);

ylabel('关节角\itq/(^。)','fontsize',5);

legend('动臂关节','斗杆关节',1);