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Problem 1896. Index one element in each vector of an array along a given dimension

Created by Oliver Woodford

Functions like min and max can return in their second output argument the index of the element in each vector along a particular dimension which meets the particular criterion being requested. E.g.

   A = rand(3);
   [B, I] = min(A, [], 2);

Write a function which, given an array A, and an index array I (like the one created above), can reconstruct the first output of functions like min and max. E.g.

   C = dimsel(A, I);

such that C is equal to B.

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10 correct solutions 22 incorrect solutions
Last solution submitted on Jun 20, 2014

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