using ismember with different arrays

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a=[4 6 1 2]
a = 1×4
4 6 1 2
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b=[4 2 1 9]
b = 1×4
4 2 1 9
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c=[8 0 5 4]
c = 1×4
8 0 5 4
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[n,m]=ismember(a,b,c); %How can i do it?
Error using ismember (line 118)
Invalid input. Valid flags are 'rows', 'legacy'.
Answer is 4... the 4 is in a,b and c

采纳的回答

Voss
Voss 2025-3-23
a=[4 6 1 2];
b=[4 2 1 9];
c=[8 0 5 4];
intersect(a,intersect(b,c))
ans = 4

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