How to set the scaling of an image (I think using Clim)

If I display an image IM, on an axes 1 by,

handles.axes1
imshow(IM, [100, 500];

How do I obtain the scaling parameters that have been used for the imshow and use a default "auto" as one option if a checkbox is ticked. I have the following code, but its not quite there.

InitialScale=get(handles.axes1, 'Clim')
lowInitial=InitialScale(1);
highInitial=InitialScale(2);

if (get(handles.checkboxAS,'Value') == 1)
  set(handles.axes1, 'Clim',[]);

else
   set(handles.axes1, 'Clim',[lowInitial, highInitial]);
end

[Jason]

just to add, I want this line to scale automsatically. but I dont want to have to redraw the image using imshow(IM,[]) as it seems pointless as the data is already there.

   set(handles.axes1, 'Clim',[]);

Answer 1

[Image Analyst]

Try caxis().

[Jason]

Thanks for the suggestion. I have the following code, but nothing happens??

%Recall saved values from when originally drawn
lowInitial=getappdata(0,'ScaleLow');   
highInitial=getappdata(0,'ScaleHigh');

handles.axes1;

if (get(handles.checkboxAS,'Value') == 1)
  %set(handles.axes1, 'Clim','auto');
  %caxis auto;
  caxis([-1 1]);

else
   %set(handles.axes1, 'Clim',[lowInitial, highInitial]);
   caxis manual;
   caxis([lowInitial, highInitial]);

end  
handles.axes1;
title('Caxis =')
drawnow;