这个程序报错，各位大神能帮我看下嘛，我是想求thetal1的变化和F的关系

玛克博罗

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syms thetal1 thetal6 thetal4 thetal5 thetal8 s r
' r  D1 B% h; f5 M7 h9 N* L+ S& f- j/ [thetal1set=[90:1:120];
thetal2=348;
: p1 R5 R- k3 A" l2 v3 w2 Z3 Uthetal3=12;
thetal8=12;
+ O$ W. y8 z* D6 y$ S+ ithetal6=zeros(size(thetal1set));
thetal4=zeros(size(thetal1set));
thetal5=zeros(size(thetal1set));
6 g( F  X" z# O6 f6 f2 Ithetal8=zeros(size(thetal1set));
s=zeros(size(thetal1set));
r=zeros(size(thetal1set));
5 W  R- v4 p4 ?+ o& z- ^1 oa=0.55;
8 H( k+ S4 |: j: t8 U5 d! {% @; t$ cb=0.89;
: P2 Z& H5 Z2 }l1=0.19;
' \5 ?; ~& N# m' P+ M) Ml2=0.38;
l4=1.007;
* i7 z- h: f! c. W) Yl5=0.15;
# m3 s2 X9 E. o8 m4 Gl7=0.45;
) t, L' C) d! hl8=0.22;
* I2 c2 {4 j+ r1 pl9=0.18;
f2=2034/4*cos(12*2*pi/360)*0.4*2;
for i=1:1:numel(thetal1set)
    thetal1=thetal1set(i);
    eq1=l4.*cos(thetal6*2*pi/360)+l1.*cos(thetal1*2*pi/360)==l5.*cos(thetal4*2*pi/360)+s.*cos(thetal3*2*pi/360);
    eq2=l4.*sin(thetal6*2*pi/360)+l1.*sin(thetal1*2*pi/360)==l5.*sin(thetal4*2*pi/360)+s.*sin(thetal3*2*pi/360)-l8;
    eq3=l7.*cos(thetal4*2*pi/360)+l9.*cos(thetal5*2*pi/360)+s.*cos(thetal3*2*pi/360)==b;
    eq4=l7.*sin(thetal4*2*pi/360)+l9.*sin(thetal5*2*pi/360)+s.*sin(thetal3*2*pi/360)==l8+a;
    eq5=l4.*cos(thetal6*2*pi/360)+l5.*cos(thetal4*2*pi/360+pi)+l1.*cos(thetal1*2*pi/360)==r.*cos(thetal8*2*pi/360);
6 J. p. r8 g- C8 {; Y9 k, N2 x    eq6=l4.*sin(thetal6*2*pi/360)+l5.*sin(thetal4*2*pi/360+pi)+l1.*sin(thetal1*2*pi/360)==r.*sin(thetal8*2*pi/360);
    sol=vpasolve([eq1,eq2,eq3,eq4,eq5,eq6],[thetal6,thetal4,thetal5,thetal8,s,r])
! e- [2 F. {+ H$ F    thetal6(i)=double(sol.thetal6);
0 e4 c% E/ y8 x+ _& o* \' t% [    thetal4(i)=double(sol.thetal4);
    thetal5(i)=double(sol.thetal5);
( e  {" `) F% J    thetal8(i)=double(sol.thetal8);
   s(i)=double(sol.s);
   r(i)=double(sol.r);
    t=sqrt(l1^2+r^2-2*l1*r*cos(thetal1*2*pi/360+thetal8*2*pi/360));
    thetal7=acos((l4^2+t^2-l5^2)/(2*l4*t))+acos((l1^2+t^2-r^2)/(2*l1*t));
    F1=f2*l7*sin(thetal4*2*pi/360-thetal3*2*pi/360)/((l5*sin(pi-acos((l4^2+l5^2-t^2)/(2*l4*l5)))));
0 Z' A* u) c6 G  L    F=F1*l1*sin(thetal7)/(l2*sin(pi-thetal1*2*pi/360));
end
plot(thetal1,F)
5 `3 d" {1 \/ I% k& h3 I8 u& {xlabel('角度/。');
: i6 n) h( H6 wylabel('缓解力/N');
hold on
5 i6 p$ H' f: ]1 a9 ygrid on
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modengxian111

问题解决了吗