how to tell if two elements in an array are identical

Hi all I need help on this. I am rather new to matlab so im sure this is an easy fix, but how would i write a code/ is there a function pre existing on matlab that is able to detect if any two(or more) elements in an array are identical, and if possible how to change the identical values

Answer 1

[madhan ravi]

Use:

isequal(A,B) %to check they are the same.

Or

A=1:5

B=[1 4 5 2 8] % to find where they are identical

index=find(ismember(A,B))

%this command represents A which is in B

[Milan Parsotam]

Hey, thanks very much for the quick feedback. i have worked on my code since, developing this

commonxvalues=ismember(xpoint,points);
  commonyvalues=ismember(ypoint,points);
  if ismember(commonxvalues,1)==0
      points(counter,1)= xpoint;
  end
  if ismember(commonyvalues,1)==0
      points(counter,2)= ypoint;
  end

how do I make it so that common values returns a logical array cheers

[madhan ravi]

provide all your datas by pasting it here