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B = repmat(A,M,N)
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ÔËÐÐhelp repmat, ¸ø³öÁË£º
CODE:
REPMAT Replicate and tile an array.
    B = repmat(A,M,N) creates a large matrix B consisting of an M-by-N
    tiling of copies of A. The size of B is [size(A,1)*M, size(A,2)*N].
    The statement repmat(A,N) creates an N-by-N tiling.

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