Problem with holding plot

Hi

I'm new with mat lab GUI so I have maybe simple question.

With one push button I'm plotting some curves and that works just fine, but I also have another check box for plotting additional line (if check box is 1 line is plotted if 0 line isn't plotted).

Question is how to hold first plot when check box is active, because in my case when I press push button curves are plotted but when check box is active line is plotted but previous curves are deleted.

Thank you

[Matt Kindig]

Maybe I'm mis-understanding the question, but can't you just turn

hold(AxisHandle, 'on');

after you create the plot, where AxisHandle is the handle to the axes you want. Or is there something more complicated going on that I'm not getting?

Matt

[toni]

h=handles.axes1;
x=[0,1000];
y=[0,1000];

      hold on;

      a=plot(h,x,y);

      if get(handles.checkbox1, 'Value')==1
          set(a,'Visible','on')
      elseif get(handles.checkbox1, 'Value')==0
          set(a,'Visible','off')
      end

Here is the callback of the check box. I added hold on but problem is now that if check box it true or false line is plotted. What I need is, if the check box is true line is plotted with previous plotted curve and if check box is false line isn't visible but curves must stay.

Thanks