Comparing two arrays of different length

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Majbah
Majbah 2014-11-17
评论： Josep Llobet 2021-10-5
Hi,
I have two arrays like, A=[11 11 2 3; 5 2 6 9] and B=[11 3; 2 9]. I want to know the indices of array A where the column of B is equal to column of A. In this case, the indices are [2 4].
How can I do that?
Thanks in Advance.

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采纳的回答

Giorgos Papakonstantinou
You could this to find it:
idx = ismember(A', B', 'rows');
c = 1:size(A, 2);
d = c(idx); % is your answer
  2 个评论
Josep Llobet
Josep Llobet 2021-10-5
indeed, maybe
ismember(0, unique(idx))
used with 0 (no-coincident) or 1 (coincident), may be useful.
Then combined with
length(unique(idx))
For to know about the totallity of coincidences

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更多回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-11-17
A=[11 11 2 3; 5 2 6 9]
B=[11 3; 2 9]
idx=find(ismember(A',B','rows'))

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