MATLAB Functions

Return the set difference of two vectors

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. The resulting vector is sorted is ascending order. In set theoretic terms, c = a - b.

c = (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,:).

A non-vector input array A is regarded as a column vector 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