How can I delete numbers in a matrix that is not equal to numbers in another matrix?

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Shi Cheng
Shi Cheng 2015-11-5
回答： Lessmann 2015-11-5
I know the title may be a little confusing.Say I have A =[1 2 2 3 3 4 4 ] and B = [2 3 4], how can I make A 'realize ' that there is a number in it different from B and delete it? Is there any simple way to do that? I want to avoid loops......Thanks!

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Lessmann
Lessmann 2015-11-5
Hi,
you can use logical indexing with the 'ismember' function:
A= A(ismember(A,B))

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