setdiff - Find set difference of two vectors
Syntax
c = setdiff(A, B)
c = setdiff(A, B, 'rows')
[c,i] = setdiff(...)
Description
c = setdiff(A, B)
returns the values in A that are not in B. In set theory terms, c = A - B. Inputs A and B can be numeric or character vectors or cell arrays of strings. The resulting vector is sorted in ascending order.
c = setdiff(A, B, 'rows'),
when A and B are matrices with the same number of columns, returns the rows from A that are not in B.
[c,i] = setdiff(...)
also returns an index vector index such that c = a(i) or c = a(i,:).
Remarks
Because NaN is considered to be not equal to itself, it is always in the result c if it is in A.
Examples
A = magic(5);
B = magic(4);
[c, i] = setdiff(A(:), B(:));
c' = 17 18 19 20 21 22 23 24 25
i' = 1 10 14 18 19 23 2 6 15
See Also
intersect, ismember, issorted, setxor, union, unique
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