19 lines
461 B
Text
19 lines
461 B
Text
function a = zigzag3(n)
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a = zeros(n, n)
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for k=1:n
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j = modulo(k, 2)
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d = (2*j-1)*(n-1)
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m = (n-1)*(k-1)
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a(k+(1-j)*m:d:k+j*m) = k*(k-1)/2:k*(k+1)/2-1
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a(n*(n+1-k)+(1-j)*m:d:n*(n+1-k)+j*m) = n*n-k*(k+1)/2:n*n-k*(k-1)/2-1
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end
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endfunction
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-->zigzag3(5)
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ans =
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0. 1. 5. 6. 14.
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2. 4. 7. 13. 15.
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3. 8. 12. 16. 21.
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9. 11. 17. 20. 22.
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10. 18. 19. 23. 24.
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