finding mismatched elements ~ismember

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Lalit Patil
Lalit Patil 2012-12-25
A = [1 2 3;2 3 4;3 4 5;4 5 6;5 6 7;6 7 8;7 8 9]
B = [2 3 4;6 7 8]
flag = ~ismember(A,B,'rows');
index = find(flag);
q = A(index(flag))
The error is
??? Index exceeds matrix dimensions.
and The index finds only first elements of each row. The remaining two should also find it.. So, how to do it.?
  2 个评论
Matt J
Matt J 2012-12-25
The index finds only first elements of each row. The remaining two should also find it.
This is not clear. Write explicitly what you want "index" and "q" to be.

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采纳的回答

Matt J
Matt J 2012-12-25
q = setdiff(A,B,'rows')

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Walter Roberson
Walter Roberson 2012-12-25
Are these integers or numbers with fractions? If they are numbers with fractions then you cannot use ismember() in most cases.
http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F

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