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How to rearrange matrix entries from another matrix entries [closed]

asked 2023-12-11 10:10:11 +0200

Akhilesh gravatar image

updated 2023-12-11 12:59:26 +0200

Suppose i have $m\times m$ matrix $D$ which is known, i have to re arrange entries of $D$ to a new $m\times m$ matrix $M$ such that $M_{i,j}=D_{j-i%m, -i%m}$. How to do it in SageMath?

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Closed for the following reason the question is answered, right answer was accepted by Akhilesh
close date 2023-12-14 06:23:18.215781

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answered 2023-12-11 14:03:32 +0200

rburing gravatar image
sage: D = matrix(QQ, 2, [[1, 2], [3, 4]]); D
[1 2]
[3 4]
sage: m = D.nrows()
sage: M = matrix(QQ, m, lambda i, j: D[(j-i)%m, (-i)%m]); M
[1 3]
[4 2]
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It worked. Thanks for the help

Akhilesh gravatar imageAkhilesh ( 2023-12-12 04:44:12 +0200 )edit

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Asked: 2023-12-11 10:10:11 +0200

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Last updated: Dec 11 '23