MATLAB: What is consuming physical memory

Question

Hello,

I have a problem. I have a GUI with three axes and three sliders. At the begining the program is fast but if you move the sliders for a while it becomes slow (it is consuming physical memory). Here it's the code of one of the sliders. ¿Could you please help me to know which is the problem?:

 global XsYs;
 sliderC=handles.tam(2)-floor(get(handles.sliderCoronal,'Value'))+1;
 XsYs(1,1)=sliderC; 
 XsYs(3,2)=sliderC;
 axes(handles.imagencoronal)
 imshow(squeeze(handles.VolumenImagen(:,sliderC,:)),[])
 axis off
 if get(handles.boxcoronal,'Value')
   plot([1 handles.tam(3)],[XsYs(2,1) XsYs(2,1)],'Color','y');  
   plot([XsYs(2,2) XsYs(2,2)],[1 handles.tam(1)],'Color','m');  
 end
 set(gca,'DataAspectRatio',[handles.dataresol(3) handles.dataresol(2) handles.dataresol(1)]);
 set(findobj(handles.imagencoronal,'Type','Image'),'ButtonDownFcn','Segmentacion(''buttonDownCallback'',gcbo,[],guidata(gcbf))'); 
 set(handles.textcorteC,'String','Corte','string',sliderC);
 delete(findobj(handles.Segmentacion,'Color','g'))
 if get(handles.boxaxial,'Value')
   plot(handles.imagenaxial,[1 handles.tam(3)],[sliderC sliderC],'Color','g','LineStyle','-');
 end
 if get(handles.boxsagital,'Value')
    plot(handles.imagensagital,[sliderC sliderC],[1 handles.tam(1)],'Color','g','LineStyle','-');
 end
 clear sliderC;
 guidata(handles.Segmentacion,handles)

Thank you

Answer 1

As far as I can see, you create new picture by imshow() and some plots each time the callback runs. This occupies memory.