# compare two arrays of different length ( inequality)

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Hello, I have two arrays with different length, for example A =[ 2 3 11 0 8 ] and B=[ 2 6 8] ( The data are bigger in the real case) and I want to compare them and find elements that verify abs(A(i)-B(j))> 2 .
Is there any fast function that do that (such ismember but for inequalities) ?

Walter Roberson on 1 Jun 2017
R2016b and later syntax:
[i, j] = find( abs(A.' - B) > 2 );
Earlier releases:
[i, j] = find( abs(bsxfun(@minus, A.', B)) > 2 );

#### 1 Comment

Elkhanssaa Marsali on 1 Jun 2017
Thank you !

MathReallyWorks on 1 Jun 2017
Hello Elkhanssaa Marsali,
Firstly, make the length of A and B equal by adding extra zeros to the array who is shorter.
After you get the length of both array equal, try this code:
A=[2 3 11 0 8]
B=[2 6 8 0 0]
C=abs(A(:)-B(:))>2
You will get proper answer in terms of 1 and 0. Here, 1 means true and 0 means false

#### 1 Comment

Elkhanssaa Marsali on 1 Jun 2017
Thank you for your answer. But the problem is that I want to verify the inequality for each element of A with all the elements of B ( so they will be 15 results ( true and false results) )