How to work with annotation?

Hello,

Is it possible to add annotation within a for loop so that the previous annotation is replaced once the new annotation is added? For example, for i = 1:100 annotation('textbox', [0, 0.5, 0, 0],'FitBoxToText','On','FontSize',25,'Tag', num2str(i), 'string', num2str(i));

this code currently piles up all the annotation on top of each other in the figure plot but what I am looking for is as the value of i steps through to 2 from 1 then the annotation at i = 1 should be replaced by i = 2. Only one annotation should be visible in the plot per iteration.

Could someone please help...Thanks!!

Answer 1

[Rik]

The trick is to use the handle to set the String property. You might need a call to drawnow to trigger a graphics update.

figure(1),clf(1)
i=1;
h=annotation('textbox', [0, 0.5, 0, 0],...
    'FitBoxToText','On',...
    'FontSize',25,...
    'Tag', num2str(i),...
    'string', num2str(i));
for i=1:5
    pause(1)
    set(h,'String',num2str(i))
end

[Rik]

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