Repeated scalar entries to a gui edit box should be stored in an array/vector format

In my gui,i have a popup menu where the user selects size of array.In the edit box below there is an edit box in which user enters a scalar entry & presses enter,then the next entry that he types at that edit box should be stored as 2nd entry of a vector & so on.

Example:-

• If user enters 100 at editbox --- array value = [100]
• next user enters 200 at editbox --- array value = [100 200]
• ....so on.
• If user exceeds size as set in popup --- array value = [].

My code:-

% At gui opening function:-

assignin('base','i',1);
assignin('base','array',[]);

%-------other part of code-----

% at editbox callback function
i = evalin('base',i);
array = evalin('base','array');
size = get(handles.popup1,'User Data'); % reads size of array to be set from popup menu
if length(array) < size
array(i) = str2double(get(hObject,'String'));
i = i+1;
assigin('base','i',i);
assigin('base','array',array);
else
assigin('base','array',[]);
assigin('base','i',1);
errordlg('Size Exceeded','Error');
end

Is there any better way to do this ?Without referencing to the base workspace each time ?

[Stephen23]

Passing values using evalin and assignin is a buggy way to program. Learn how to pass variable properly and your code will be much neater, faster to run, and easier to debug.

http://blogs.mathworks.com/videos/2010/03/08/top-10-matlab-code-practices-that-make-me-cry/

http://www.mathworks.com/help/matlab/matlab_prog/share-data-between-workspaces.html

http://www.mathworks.com/help/matlab/creating_guis/share-data-among-callbacks.html