Graphics on pushbuttons for gUI's

Hi, Im trying to put an image onto a push button. However, I seem to be missing something.

Heres my attempt.

Al=imread('LeftArrow.png');
a(:,:,1) = Al;
a(:,:,2) = Al;
a(:,:,3) = Al;
set(handles.pushbuttonLEFT,'CData',a)

Answer 1

[Walter Roberson]

Your png file is RGB, so Al is already 3 dimensional. When you try to assign the 3 dimensional array to the two dimensional array a(:,:,1) you are going to fail.

[Jason]

Oh yes thank you, the following now works.

Al=imread('LeftArrow.png');
set(handles.pushbuttonLEFT,'CData',Al)

But it swamps the push button. Does matlab allow the image to be made smaller, so you can still see the 3D effect of the pushbutton? Thanks

[Walter Roberson]

If you have the appropriate toolbox you can imresize() what you send into CData.

[Jason]

Thankyou