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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clc
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& k" x+ R& c, dsyms thetal1 thetal6 thetal4 thetal5 thetal8 s r
thetal1set=[90:1:120];
thetal2=348;
; M; u; x7 a( Q5 x+ ]& h" dthetal3=12;
  G1 g% v& w0 A) Athetal8=12;
thetal6=zeros(size(thetal1set));
  W- o# }; M) Q. Dthetal4=zeros(size(thetal1set));
+ W3 {: c2 A. I1 f1 ]0 D, n* pthetal5=zeros(size(thetal1set));
8 u/ B2 b  ?% z  jthetal8=zeros(size(thetal1set));
s=zeros(size(thetal1set));
r=zeros(size(thetal1set));
& f7 O$ g! _! L- g/ d9 \% `4 v  }1 J9 Za=0.55;
b=0.89;
7 [# q$ t- Y. H: E( ], B! h) Xl1=0.19;
' p5 k. I; A* b" A8 Ul2=0.38;
l4=1.007;
  E9 A. ^& O9 f0 T5 X% |l5=0.15;
0 v" E8 o& F3 z$ v1 l* u# p1 ol7=0.45;
/ m. a1 k- O, J. t: I, }; r. T* hl8=0.22;
) \  j: Y7 b: D; Ol9=0.18;
f2=2034/4*cos(12*2*pi/360)*0.4*2;
2 Q3 {! n$ m# Q' J& N% L, A. Efor i=1:1:numel(thetal1set)
% B$ `  V) x" D/ Z) o+ x8 o    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;
% W. h: @5 y$ a9 p# E0 E    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);
    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);
$ F$ F; x( Y( b" V+ [    sol=vpasolve([eq1,eq2,eq3,eq4,eq5,eq6],[thetal6,thetal4,thetal5,thetal8,s,r])
5 \: E" x. J. I' I5 f7 k7 `    thetal6(i)=double(sol.thetal6);
9 r2 I* A: t3 F# T% _    thetal4(i)=double(sol.thetal4);
: @0 X7 Q$ S! m    thetal5(i)=double(sol.thetal5);
    thetal8(i)=double(sol.thetal8);
   s(i)=double(sol.s);
% V; v1 C9 b- r   r(i)=double(sol.r);
7 @$ R% L. b3 A  {7 d; D! Y4 p    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));
& H# V, i( s: y% ~" Q+ U$ i    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)))));
+ ~4 S7 h6 v1 P    F=F1*l1*sin(thetal7)/(l2*sin(pi-thetal1*2*pi/360));
end
plot(thetal1,F)
xlabel('角度/。');
* s# r/ p* h* t8 j+ M$ S$ J$ Z! Uylabel('缓解力/N');
4 |  }- \$ n5 z, A- i9 Yhold on
grid on
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modengxian111

问题解决了吗