Find elements in one array not in another

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Sharon
Sharon 2012-5-29
I have
a=1 3 5 6
b=2 4 3 7
I need to find first_set=1 5 6 second_set=2 4 7
I tried
p=ismember(a,b);
first_set=a(~p)
q=ismember(b,a);
second_set=b(~q)
is there an easier way to do this?
  1 个评论
Image Analyst
Image Analyst 2012-5-29
Be sure to read and understand the FAQ if you're working with single or double class numbers. http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F Depending on how you get the numbers, they may not be equal even though you think they should be.

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采纳的回答

Thomas
Thomas 2012-5-29
try setdiff
doc setdiff
% in above case
first_Set=setdiff(a,b)
second_set=setdiff(b,a)

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