Dynamically defined matrices in Simulink

Hi,

I've got following problem. I want to declare a matrix which is created dynamically be adding rows in a loop. And i want to do that in Embedded Matlab Function in Simulink.

I tried it first in m-file like this:

function y = fcn(X)

X=[3 4; 4 5; 6 6; 3 4]
Y=[];
[l_x, l_y]=size(X);

for i=1:l_x
if i=2
Y=[Y ;X(i,:)];
else
Y=[Y ;X(i,:)];
end
end

 y=Y;

 end

So, in normal m-file it works properly, but in Simulink not. Anyone can think of a solution and what causes the problem?

[Azzi Abdelmalek]

What is the error message?

[Daniel]

Its like this

Size mismatch (size [0 x 0] ~= size [1 x 2]

edit: made a mistake, now its correct (size is [1 x 2]) Function 'Embedded MATLAB Function' (#31.68.88), line 9, column 5: