Refresh annotate on figure in loop
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Hello.
I have read several other solutions that use various methods to replace an annotation with each figure refresh, but none of them seem to work for me. The annotations just keep stacking to the side of the first.
I've tried the solutions found here (to no avail):
figure;
a1 = [];
a2 = [];
for k = 1:K
%compute indices for the current frame
n = (1:N)+(N*(k-1));
%signal 1
x = s1(n);
E_m1(k) = (x'*x)/N; %Normalized frame energy
subplot(211);
plot(n,s1(n),'b',n,e(n),'g:');
%annotation stuff
str1 = sprintf('NFE %d', E_m1);
dim1 = [0.662 0.622 .3 .3];
delete(a1);
a1 = annotation('textbox',dim1,'string',str1,'FitBoxToText','on');
%pause between frames, waiting for keypress
pause(1)
end
Thanks for your time.
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Answers (1)
Rik
on 8 Oct 2020
Create the annotation object once, and update the String property inside your loop.
I would suggest drawnow to trigger the update of the graphics and to process any queued callbacks (e.g. those triggered by keypresses).
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