Is it that you have 10 popupmenus and N listboxes, or one popumenu and one listbox?
If you only have one of each, then shouldn't your array only have two ones in it?
Perhaps if you give a very small example...
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EDIT In response to clarifying comments.
Here is an example, based on what you said. Note that the array is only displayed when a popup value is chosen, so select from the listbox first to fill in a column other than the first. You could alter this by putting the same code in the listbox callback...
function [] = pop_ex()
% Help goes here.
S.fh = figure('units','pixels',...
'position',[10 30 120 140],...
'menubar','none',...
'name','slider_ex',...
'numbertitle','off',...
'resize','off');
S.pp = uicontrol('style','pop',...
'unit','pix',...
'position',[20 20 120 40],...
'string',{'one','two','three','four'},...
'callback',@pp_call);
S.ls = uicontrol('style','list',...
'unit','pix',...
'position',[20 80 120 40],...
'string',{'lone','ltwo','lthree','lfour','lfive','lsix'});
guidata(S.fh,S)
function [] = pp_call(varargin)
% Callback for the popup.
S = guidata(gcbf);
A = zeros(length(get(S.pp,'string')),length(get(S.ls,'string')));
R = get(S.pp,'val');
C = get(S.ls,'val');
I = sub2ind(size(A),[R R],[1 C]);
A(I) = 1 % Display in command window.
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EDIT Address multi-selectable listboxes.
If the listbox is multi-selctable, then use this line instead:
I = sub2ind(size(A),[R repmat(R,1,length(C))],[1 C]);
