MATLAB: Looping for replace matrix elements

manipulation indexmatrix

Helo,
I have matrix 3×3, let's say
XX = [3,0,0;
      0,3,3;
      4,5,4]
I want to generate matrix 9×3 which value same with matrix XX every forth row. as illustration:
XXnew = zeros (9,3)
as result :
XXnew = [3,0,0;
         0,3,3;
         4,5,4;
         3,0,0;
         0,3,3;
         4,5,4;
         3,0,0;
         0,3,3;
         4,5,4];
How to code with "for end" function.
Thank you!

Best Answer

   XX = [3,0,0;0,3,3;4,5,4] ;
   iwant = repmat(XX,3,1);
doc repmat.
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