MATLAB: Error using imwrite command

image processingimage writingpermission error

I am using the imwrite commant for writing the image but i have an error 'you might not have write permission'…How can i resolve it..i am using the following code.
clear cam
cam=webcam;
for i=1:10
    A=snapshot(cam);
    cam.Resolution='320x240';
    imwrite(A,['133MC',num2str(i),'.jpg']);
end
v=VideoWriter('myVideo.avi');
v.FrameRate=2;
open(v)
for i=1:10
       K=imreade(['133MC',num2str(i),'.jpg']);
       writeVideo(v,K);
end
close(v)
Error is:
Error using imwrite (line 467)
Unable to open file "133MC1.jpg" for writing. You might not have write permission.
Error in Lab3 (line 27)
imwrite(A,['133MC',num2str(i),'.jpg']);

Best Answer

The error message is clear: Either the file is existing already and you cannot overwrite it (maybe it is open in another program already), or you do not have write permissions in the current folder. What is the output of
cd
? Use a specified folder:
folder = tempdir;
...
      imwrite(A, fullfile(folder, ['133MC',num2str(i),'.jpg']));
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