how to find the Reverse process of A(B).

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Tanveer ul haq
Tanveer ul haq 2020-3-27
编辑： the cyclist 2020-3-27
I have two arrays A and B. for instance,
A=[1 3 2 4 5 6 7 8 8 9 11];
B=[10 4 3 1 7 6 9 5 2 8 11];
in matlab
A(B)=[9 4 2 1 7 6 8 5 3 8 11];
My question is: How to calculate A, if B and A(B) are given.
Any help will be appericiated.

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采纳的回答

Adam Danz
Adam Danz 2020-3-27
编辑：Adam Danz 2020-3-27
A=[1 3 2 4 5 6 7 8 8 9 11];
B=[10 4 3 1 7 6 9 5 2 8 11];
C = A(B);
A2(B) = C;
However, if B contains duplicate values, A2 will not equal A.
  1 个评论
the cyclist
the cyclist 2020-3-27
编辑：the cyclist 2020-3-27
On that last point ...
To be clear, no algorithm would guaranteed to replicate A, if there are duplicate values in B, because there is insufficient information to do so. But you can find an A that is consistent with A(B) = C.

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更多回答（1 个）

the cyclist
the cyclist 2020-3-27
C = [9 4 2 1 7 6 8 5 3 8 11];
A(B) = C

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