How to find pixels's neighbours?

I have two vectors of pixels with their position x and y length of vectors is not the same and their length is 520 There is an exemple: A = 20 40 60 120 30 50 100 140 B = 40 20 50 30 the result : pixels (20,30) and (40,50) are the same in two vectors so i have D = 40 20 as a result 50 30

[Sebastian Holmqvist]

Consider using punctuation in your question. I can't make sense of it.

Also, mark your code with the Code-button. I.e

A = [20 40 60 120 30 50 100 140]
B = [40 20 50 30]

[Mohamed Amine]

A = (20,30) (40,50) (60,100) (120,140) B =(20,30) (40,50) result D = (20,30) (40,50)

[Ryan]

To clarify, are you trying to locate points in B that are also in A?

[Jan]

@Mohamed: Do you see the difference in the readability of Sebastian's example code and your one? It would be very helpful, when you edit the original question and insert full stops at the end of each sentence. To learn more about code formatting and asking good questions, follow the "About MATLAB Answers" link on the left side.

Answer 1

[Sean de Wolski]

doc intersect

And specifically:

intersect(A,B);

or ismember

C = A(ismember(A,B))

[Image Analyst]

Seems like it, based on his comment. But why are these "neighbors" of some pixels? Does this do what his subject line asks?

[Sean de Wolski]

They were selected based on their responses to a survey?