How to debug "Value must be a handle" error.

For some expressions of x_k, y_k, E_k, why the error "Value must be a handle" is copming for the follwing code:

figure(1)

sub1=subplot(2,1,1);

ani1 = animatedline('Color','r');

sub2 = subplot(2,1,2);

ani2 = animatedline('Color','k');

for k=1:length(t)

t_k = t(k);

x_k = x(k);

y_k = y(k);

E_k = E(k);

plot(x_k, y_k,'go','LineWidth',1.5,'MarkerSize',2)

hold on

title(['Time=',num2str(k*0.01)]);

addpoints(ani1,x,y);

plot(t_k, E_k,'go','LineWidth',1.5,'MarkerSize',2)

hold on

addpoints(ani2,t, E(1:end-1));

drawnow

end

Can anyone plz help?

[Adam Danz]

Please share the entire copy-pasted error message so we can get a bit more info. Specifically, what line is causing this error? I don't see any unexpected arguments that should be handles upon a quick glance.

A common culprit is when a the user has a file on path that matches the name of a MATLAB file but has a different set of input arguments. Using which(__,'all') is helpful for identifying those issues.

[Pallov Anand]

Error using matlab.graphics.animation.AnimatedLine/addpoints

Value must be a handle.

Error in desiredpoint (line 106)

addpoints(ani2,t, E(1:end-1));

[Adam Danz]

Thanks, please fill in your MATLAB Release info on the right column of this page or share it here.