How to replaced image in folder?

Hi guys. I have a question, that is how to duplicate an image in the folder? for example i have a picture in folder a, then i will save new image into folder a, and the previous image will be erased and replaced with new image.

Answer 1

[KSSV]

Let your image name be myimage.

if exist(myimage,'file')
   error('this image exists in the folder, please choose different name\n') ;

end