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Problem 2585. How to reverse spdiags ?

The spdiags function extracts all nonzero diagonals from the m-by-n matrix A.

So if A=[1 2 3;4 5 6;7 8 9],

spdiags(A)=[7 4 1 0 0;0 8 5 2 0;0 0 9 6 3].

But if I give you spdiags(A), can you give me A ?

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18.4% Correct | 81.6% Incorrect
Last solution submitted on Sep 18, 2019

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