Bug or restriction with matrices?

[Lucio Agostinho Rocha]

Hi,

I'm working with matrices and I observed this strange behavior. I'd like to acquire as result a matrix with ten lines and ten columns. Then, I tried two things:

//---Start program
clear;
m=zeros(10,10);
function [] = test()
    
  test1(m);
  
  m(5,1)=1;
  disp(m);
endfunction

function [] = test1(m)
  
  m(5,1)=1;
  disp(m);
  
endfunction

//---End program

When I use 'test1' function I acquire the expected result, but when I use only 'test' function, considering 'm' as global, the attribution 'cut' my matrix. Why this occurs?

Thanks in advance,

Lucio
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