How can I get GUIDE to add multiple 'edit texts' to a figure?

I'm trying to learn how to code uicontrols! I want the user to input a number (n), and I want the program to produce (n+1) edit texts to get data from the user! :( I think uicontrols just accept strings :( . Is that right?

this is a part of the code I have written in the callback part.

n_orders = get(handles.e1, 'String');
n_order=str2double(n_orders);
set(handles.e1,'String','')
n_coef=n_order+1;