CODEWITHSUNDEEP
matlab
Menkot
Menkot

Reputation: 734

How to get the difference of matrixes without repetitions removed

The function setdiff(A,B,'rows') is used to return the set of rows that are in A but not B, with repetitions removed.

Is there any way to do it without removing the repetitions? Thanks a lot.

Upvotes: 0

Views: 112

Answers (1)

Adiel
Adiel

Reputation: 3071

You can use ismember instead of setdiff, to find all the rows of B that appear in A.

Because you want only those that NOT appear in A, use the ~ sign, and finally take all A rows in these rows indices:

A =

     1     2     3
     4     5     6
     1     2     3
     7     8     9

B =

     4     5     6

C=A(~ismember(A,B,'rows'),:)

C =

     1     2     3
     1     2     3
     7     8     9

Upvotes: 3

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