MATLAB Function Reference

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

setappdata

setdisp (hgsetget)