add values to my matrix each time i click on the button gui

Hello, i need to know how can we add values to our matrix each time i click on a button, i declared a global variable matrix, but each time i have the same values, i used this method in the button_callback

    A = [1 2 3;
     4 5 6]
newrow = [x y z]; % value to add
%add a row to existing matrix:
A = [A; newrow]

my problem is that i always have 3*3 matrix even if i'm pushing the button several time so, if you have any idea please help.

thanks and sorry for my bad english

[omar Benamiar Messari]

a also did this but have the same problem.

    function gui1_OpeningFcn(hObject, eventdata, handles, varargin)
handles.matrix=[];
function start_Callback(hObject, eventdata, handles)
newrow=[8,8,8,8];
handles.matrix=[handles.matrix;newrow];
guidata(hObject, handles);

Answer 1

[Andy]

Each time the code runs you are setting the matrix A to its start value, a 2 x 3 matrix, then adding row three. The answer will always be a 3 x 3 matrix. You need to store the current value of the matrix globally then just add the new row.

[omar Benamiar Messari]

i already did that but it's not working,

function varargout = gui1(varargin) global matrix; matrix=[];

this button to add values to my matrice

function start_Callback(hObject, eventdata, handles) global matrix; newrow=[15,0,0,0]; matrix=[matrix;newrow];

did i did something wrong ?