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求教大佬们，我这个图输出不出来，说是错误使用plot，跪求 clc;clear %%---------赋初值---------%% a=0.014; b=0.008; l1=0.140; l2=0.140; l3=0.140; l4=0.280; lo=0.12; l5=sqrt(a^2+b^2); g3=102; g4=250; g5=220; j3=0.014; j4=3.0; g=9.8; m3=g3/g; m4=g4/g; m5=g5/g; w1=3*pi t=0:1:360; tj=t*pi/180; du=pi/180; F=[]; J=[]; M=[]; %%--------计算程序-------%% for i=1:length(tj); o1=tj(i); A=2*l1*l3*sin(o1)-2*b*l3; B=2*l3*(l1*cos(o1)-a); C=(l2)^2-(l1)^2-(l3)^2-(l5)^2+2*l1*a*cos(o1)+2*b*l1*sin(o1); m=(A-sqrt(A^2+B^2-C^2))/(B-C); o3=2*atan(m); o2=acos((a+l3*cos(o3)-l1*cos(o1))/l2); o4=asin(-lo*sin(o3)/l4) %%---------解角度%% s=lo*cos(o3)+sqrt((l4)^2-(lo)^2*(sin(o3))^2)-0.2702;%%-----计算滑块位移%% q(i)=s; K=[-l2*sin(o2) l3*sin(o3) 0 0; l2*cos(o2) -l3*cos(o3) 0 0; 0 lo*sin(o3) l4*sin(o4) 1; 0 lo*cos(o3) l4*cos(o4) 0]; %%---------速度系数矩阵%% L=[w1*l1*sin(o1); -w1*l1*cos(o1); 0; 0]; J=K\L; %%------------解出速度%% w2=J(1); w3=J(2); w4=J(3); v5=J(4); F=[F',v5']; H=[l2*cos(o2) -l3*cos(o3) 0 0; l2*sin(o2) -l3*sin(o3) 0 0; 0 -lo*cos(o3) -l4*cos(o4) 0; 0 -lo*sin(o3) -l4*sin(o4) 0]; %%-----------加速度系数矩阵%% G=[w2^2; w3^2; w4^2; 0]; P=[w1^2*l1*cos(o1); w1^2*l1*sin(o1); 0; 0]; js=K\(H*G+P); %%-----------解出加速度%% a2=js(1); a3=js(2); a4=js(3); a5=js(4); J=[J',a5']; p3x=-m3*0.5*l3*(sin(o3)*a3+cos(o3)*w3^2); p3y=m3*0.5*l3*(cos(o3)*a3-sin(o3)*w3^2); p4x=m4*(-lo*sin(o3)*a3-0.5*l4*cos(o4)*a4-lo*cos(o3)*w3^2-0.5*l4*cos(o4)*w4^2); p4y=m4*(lo*cos(o3)*a3+0.5*l4*sin(o4)*a4-lo*sin(o3)*w3^2-0.5*l4*sin(o4)*w4^2); K=[1 0 0 0 0 0 0 0 0 0 0 0 0 0; 0 1 -1 0 0 0 0 0 0 0 0 0 0 0; 1 0 0 -1 0 0 0 0 0 0 0 0 0 0; 0 1 0 0 -1 0 0 0 0 0 0 0 0 0; l4*abs(sin(o4)) l4*abs(cos(o4)) 0 0 0 0 0 0 0 0 0 0 0 0; 0 0 0 1 0 -1 0 1 0 0 0 0 0 0; 0 0 0 0 1 0 -1 0 1 0 0 0 0 0; 0 0 0 -lo*abs(sin(o3)) lo*abs(cos(o3)) -l3*abs(sin(o3)) l3*abs(cos(o3)) 0 0 0 0 0 0 0; 0 0 0 0 0 1 0 0 0 -1 0 0 0 0; 0 0 0 0 0 0 1 0 0 0 -1 0 0 0; 0 0 0 0 0 0 0 0 0 l2*abs(sin(o2)) -l2*abs(sin(o2)) 0 0 0; 0 0 0 0 0 0 0 0 0 1 0 1 0 0; 0 0 0 0 0 0 0 0 0 0 1 0 1 0; 0 0 0 0 0 0 0 0 0 l1*abs(sin(o1)) -l1*abs(sin(o1)) 0 0 1]; %%----------力系数矩阵%% if 69*du<o1&&o1<229*du %%受力区间%% pr=1800; else pr=0; end L=[-m5*a5-pr; -g5; -p4x; g4-p4y; j4*a4+0.5*g4*l4*abs(cos(o4))-0.5*p4x*l4*abs(sin(o4))-0.5*p4y*l4*abs(cos(o4)); -p3x; g3-p3y; 0.5*g3*l3*abs(cos(o3))-j3*a3+0.5*p3x*l3*abs(sin(o3))+0.5*p3y*l3*abs(cos(o3)); 0; 0; 0; 0; 0; 0]; F=K\L; %%解出力%% m=F(14); M=[M m]; end %%----------输出图像----------%% figure(1); subplot(2,2,1) plot(t,q,'r.');hold on; title('滑块位移随o1的变化曲线'); subplot(2,2,2) plot(t,F,'r.');hold on; title('滑块速度随o1的变化曲线'); subplot(2,2,3) plot(t,J,'r.');hold on; title('滑块加速度随o1的变化曲线'); subplot(2,2,4) plot(t,M,'r.');hold on; title('构件1的平衡力偶随o1的变化曲线'); 错误使用 plot 向量长度必须相同。出错 Untitled (line 120) plot(t,F,'r.');hold on;

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