Problems plotting, and variables

Im creating a code so MU need to have 2 columns and "n" rows. (Column 1 and 2 are for storing solutions 1 and 2 (ns) respective.)

and also make a graph of MU with respect to theta, showing both solutions (solutions are in different scrpt)

BUT I got this error message "Unable to perform assignment because the indices on the left side are not compatible with the size of the right side." MU(:,1)=th4-th3(:,ns);

CAN SOMEONE HELP ME PLS ?

So my code is :

 ns=1; % Number of solution (ns)
 MU(:,1)=th4-th3(:,ns);
 MU(:,2)=th4-th3(:,ns);

 ns=2; 
 %MU=th4-th3(:,ns);
 MU(:,1)=th4-th3(:,ns);
 MU(:,2)=th4-th3(:,ns)
 
 
 figure
hold on

plot(th2,MU(:,1),'b.'); % (th2 is already calculated at the top of the code)
plot(th2,MU(:,2),'r-');

axis equal
xlabel('x')
ylabel('y')
title('Ángulo de Transmisión')

[Ive J]

post some example values in th3 and th4.

Answer 1

[Image Analyst]

th4 does not have as many rows as th3. What does this show?

[rows3, columns3] = size(th3)
[rows4, columns4] = size(th4)

[ESTEFANIA RODRIGUEZ]

Thanks for ur comment!!! that made me found the mistake