C = setdiff(A,B)
C = setdiff(A,B,vars)
C = setxor(A,B,vars,setOrder)
[C,iA] = setxor(___)
C = setdiff(A,B,vars) returns the set of observations that are in A but not B, considering only the variables specified in vars, with repetitions removed. The observations in the dataset array C are sorted by these variables. The values for variables not specified in vars for each observation in C are taken from the corresponding observation in A. If there are multiple observations in A that correspond to an observation in C, those values are taken from the first occurrence.
[C,iA] = setxor(___) also returns the index vector iA such that C = A(iA,:). If there are repeated observations in A, then setxor returns the index of the first occurrence. You can use any of the previous input arguments.
Input dataset arrays.
Cell array of strings containing variable names or a vector of integers containing variable column numbers, indicating the variables that setdiff considers.
Specify vars as  to use its default value of all variables.
Flag indicating the sorting order for the observations in C. The possible values of setOrder are:
Dataset array with the observations that are in A but not B, with repetitions removed. C is in sorted order (by default), or the order specified by setOrder.
Index vector, indicating the observations from A that are in C. The vector iA contains the index to the first occurrence of any repeated observations in A.
Create a scalar structure array, and then convert it into two dataset arrays.
S(1,1).Name = 'CLARK'; S(1,1).Gender = 'M'; S(1,1).SystolicBP = 124; S(1,1).DiastolicBP = 93; S(2,1).Name = 'BROWN'; S(2,1).Gender = 'F'; S(2,1).SystolicBP = 122; S(2,1).DiastolicBP = 80; S(3,1).Name = 'MARTIN'; S(3,1).Gender = 'M'; S(3,1).SystolicBP = 130; S(3,1).DiastolicBP = 92; A = struct2dataset(S(1:2)); B = struct2dataset(S(2:3));
The intersection of A and B is the second observation, with last name BROWN.
Return the set difference of A and B.
[C,iA] = setdiff(A,B)
C = Name Gender SystolicBP DiastolicBP 'CLARK' 'M' 124 93 iA = 1
The first observation in A is not present in B.