How do I assign two separate grid on check boxes for two separate plots in a gui?

This is my callback function for the first check box for plot which works fine on its own

a=get(hObject,'Value');
if a==1
    grid on;
    axes(handles.axes4)
else
    axes(handles.axes4)
    grid off;
end

But when I try and turn on the checkbox for the grid in plot 2 it turns the grid on and off for plot 1 , and then turns on and off if plot 2 this is my callback for checkbox 2

a=get(hObject,'Value');
if a==1
    grid on;
    axes(handles.axes2)
else
    axes(handles.axes2)
    grid off;
end

Answer 1

[Greg]

You're calling grid on before forcing the active axes, which means you're going to have very unreliable behavior. You did better with grid off, but the best implementation is to pass the axes handle into the grid call:

grid(handles.axes2,'on');