how to string a data from uitable that been input by the user?

Question

1. I'm trying to build a matrix form by creating a uitable in GUIDE. So I want the user to enter data into the table and I want to use the data at the pushbutton. But I dunno how to string the data from the table to the pushbutton. Is there any way to program the table? Im just take callback only. Do I have to take the create function, cellselectionfunc and etc in my m-editor?

2. I want to make a 3 by 3 matrix, but I cannot edit the row at property inspection. When I delete the 4th row and I apply, its always has 4 rows. I just want to make 3 by 3 matrix. Not 4 by 3.