MATLAB: Converting from 1 x n x 3 to n x 3

convert

I have a file with the data as image one. But my code will only work if the data is in a n x 3 matrix (e.g. image 2)

 squeeze(your_matrix)

eg: squeeze(1xnx3) gives you nx3 matrix

repmat(A,100,1)

where A is your vector.

Probably more clever ways, but

N=3;        % number elements to duplicate
A=a(1:N);   % first row
for i=2:numel(a)-(N-1)
  A=[A;a(i:i+N-1)];  % fixed typo of N-2 prior
end