how to execute loop again and again without double executing the program?

Question

kanu 2014-4-10

0
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https://ww2.mathworks.cn/matlabcentral/answers/125225-how-to-execute-loop-again-and-again-without-double-executing-the-program

评论： kanu 2014-8-12

On any image if i clicked two times then i got the distance between that two points. Again i want to do same step without executing the program then which loop will work? I mean how it execute again and again.. my single two points execution is...

promptMessage = sprintf('left click on the two points'); titleBarCaption = 'Continue ?'; button = questdlg(promptMessage,titleBarCaption,'Continue','Cancel','Continue'); if strcmpi(button,'cancel') return; end [x,y] = ginput(2) distance = sqrt((x(2)-x(1))^2+(y(2)-y(1))^2) Message = sprintf('the distance is %3f pixel', distance); uiwait(helpdlg(message));

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Answer 1

Mischa Kim 2014-4-10

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https://ww2.mathworks.cn/matlabcentral/answers/125225-how-to-execute-loop-again-and-again-without-double-executing-the-program#answer_132903

在 MATLAB Online 中打开

Kanu, something like (not optimized)

 ...
 exitFLAG = true;
 while exitFLAG
    [x,y] = ginput(2)
    if ~strcmp(get(gcf,'Selectiontype'),'normal')
        exitFLAG = false;  % exit for mouse right-click
    end
    distance = sqrt((x(2)-x(1))^2+(y(2)-y(1))^2) 
    Message  = sprintf('the distance is %3f pixel', distance); 
 end