MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur Page 51

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More About Matrices and Arrays
k = find(isprime(A))'
picks out the locations, using one-dimensional indexing, of the primes in the
magic square:
k=
2 5 9 1 0 11 13
Display those primes, as a ro w vector in the order determined b y k,with
A(k)
ans =
53211713
When you use k as a left-hand-side index in an assignment statement, the
matrix structure is preserved:
A(k) = NaN
A=
16 NaN NaN NaN
NaN 10 NaN 8
96NaN12
41514 1
2-29
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