trouble preventing movie frames overlapping

Hi!

I am using the following code to make a movie...

for j = 1:10

    pcolor(longs,lats,qspeed(:,:,j)), shading flat
    annotation('textbox',[0.24 0.54 0.2 0.1],'String',{datestr(date(j),12)},...
    'FontSize',16,'LineStyle','none','Color',[1 1 1]);
    F(j) = getframe;
end
movie(F,5)

...the problem I have is the textbox containing the date for each frame simply appears on top of the previous one. I need it to replace the previous one but cannot figure out the correct command. Any help greatly appreciated. Thanks

Answer 1

[Image Analyst]

You need to clear the other text. Use this function:

%=====================================================================
  % Erases all lines from the current axes.
  function ClearTextFromAxes()
    try
      axesHandlesToChildObjects = findobj(gca, 'Type', 'text');
      if ~isempty(axesHandlesToChildObjects)
        delete(axesHandlesToChildObjects);
      end
    catch ME
      errorMessage = sprintf('Error in function ClearTextFromAxes.\nError Message:\n%s', ME.message);
      WarnUser(errorMessage);
    end
    return; % from ClearTextFromAxes

Just call ClearTextFromAxes before you call pcolor().

Or, you might want to call "cla" before you call pcolor since otherwise ALL the images you display become stored in the axes and your process will slow way down as you get to dozens and dozens of images.

[Chris ODonnell]

Thanks for the quick response IA. I have tried this and it is still overwritting?? so Im still stuck

Any ideas?

Thanks

[Image Analyst]

It should not. Set a breakpoint on the "if" statement. Then examine axesHandlesToChildObjects to see if it's empty. If it's empty, then you should have no text displayed. If it's not empty, watch the screen as it executes the delete statement and the text should disappear. Last resort is to call cla just before pcolor.