cancel button code in inputdlg box in MATLAB

2011 3 27
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hi all i need help to get cancel button code in inputdlg box in MATLAB.when i press cancel button i got error. please reply me in a soon time if any one know the answer.
my code is
global A;
[angle]= inputdlg('Please Input Angle');
angle = str2double(angle);
A=imrotate(A,angle,'crop');
subplot(231),imshow(A),title('Orginal Image with Rotation');
Many thanks

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Walter Roberson
Walter Roberson 2011-3-27

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If you use cancel, then the return from inputdlg will be the empty matrix, detectable with isempty()

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