Input matrix easy question

[Oscar Bayona Candel]

Hi all,
 
This is an easy question but I writte you because I´m not able to find the solution.
 
 
Well I want to use an input file of data supuse matrix A which has 3 rows and 4 colums.
 
 
I define this matrix in a file like this
 
function [A]=EX();
 
A=[1 2 3 4
2 3 4 8
3 5 5 5];
 
 
I save this information in a file.
 
In another file I want to call A from EX()
 
so I type [A]=EX();
 
But I don´t now why it only recognise the first column¡¡¡ In facto if I pick size(A) it says 1,3
 
What I´m doing wrong?
 
My intention is to rest A(2,1)-A(1,2)
 
Thanks and sorry for this silly questions.
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