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1 | function B = block_repeat(A,p) |
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2 | % make a sparse, block diagonal matrix by repeating A p times as the blocks. |
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3 | |
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4 | Adim = size(A); |
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5 | rows = Adim(1); |
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6 | cols = Adim(2); |
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7 | |
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8 | %for i = 1:p |
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9 | % block_row = [zeros(cols*(i-1),rows); A'; zeros(cols*(p-i),rows)]'; |
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10 | % B = [B;block_row]; |
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11 | %end |
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12 | |
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13 | newrows = rows*p; |
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14 | newcols = cols*p; |
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15 | |
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16 | B = sparse([],[],[],newrows,newcols,rows*cols*p); |
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17 | for i = 0:p-1 |
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18 | for j = 1:rows |
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19 | for k = 1:cols |
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20 | B(i*rows+j,i*cols+k) = A(j,k); |
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21 | end |
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22 | end |
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23 | end |
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