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

2023 1 9
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更新时间：2023 1 9
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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?

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Adam Danz
Adam Danz 2023-1-9
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
Pallov Anand 2023-1-9
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
Adam Danz 2023-1-9
Thanks, please fill in your MATLAB Release info on the right column of this page or share it here.

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