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On the gui, I have push buttons and an axes. The first push button loads an image into the axes. The second is supposed to perform some function on the first image then display the resultant image to the same axes. But I dont understand how to change the image in the axes to the new one. How do I do this? Thank you.
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Your problem has been explained before, I hope the link helps you out:
Just use image() or imshow(). As long as you have just one axes (as you seemed to indicate), it should display just fine. Use cla beforehand to clear out any old image, otherwise the images will "pile up" in the control.
cla; axes(handles.axesImage); % Only needed if you have multiple axes. imshow(yourImage);
Agree with Image Analyst, you can use the same command as with the first button to display. Alternatively changing the CData property of you image may be a faster alternative.
imh = imhandles(your_gui_handle); %gets your image handle if you dont know it set(imh,'CData',NEWIMAGE);