How to quickly find the indecies of elements in an array?

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Benson Gou
Benson Gou 2021-5-23
评论： Torsten 2021-5-23
Dear All,
I have an array A which contains integers. I have another array B. I want to find out the indecis of B in A.
For example, A = [1 9 2 8 3 7 4 6 5], B = [5 6 7]. The indecis of B in A is [9 8 6].
Thanks.
Benson

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采纳的回答

per isakson
per isakson 2021-5-23
编辑：per isakson 2021-5-23
Ran in:
A = [1 9 2 8 3 7 4 6 5];
B = [5 6 7];
[~,ix] = ismember( B, A )
ix = 1×3
9 8 6

更多回答（1 个）

Torsten
Torsten 2021-5-23
indices = find(A==B)
  2 个评论
Benson Gou
Benson Gou 2021-5-23
Hi, Torsten,
I got an error message: Matrix dimensions must agree.
Thanks.
Benson
Torsten
Torsten 2021-5-23
Ok, seems a loop is required to find the indices for more than one element using the "find" command.

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