How to identify duplicate values in an n dimensional array , then club the linked values related to it in another array

How to identify duplicate values in an n dimensional array , then club the linked values related to it in another array

for example

A= [ 1 8 10 4

1 8 4 0]

how to identify the repeated value and then club the value in another matrix B and set repeated values to null

[Jan]

How does the wanted B look like for this input?

[sakshi chopra]

I want B to look like as

if A=[1 8 ;

3 4;

10 9;

8 5;

9 6]

B=[ 1 8 5

3 4 0

10 9 6]

[Jan]

I have no idea, how B can be constructed based on A. You asked for duplicate elements in A. Now there is one 5 only in A, so why does 5 occur in B?Why is B 3x3 and not 9x1?

Answer 1

[Jan]

A = [ 1  8  10  4; ...
      1  8   4  0];
T    = isMultiple(A);
B    = A(T)    % ? or what do you want?
A(T) = 0;

function T = isMultiple(A)
[S, idx] = sort(A(:).');
m        = [false, diff(S) == 0];
ini      = strfind(m, [false, true]);
m(ini)   = true;        % Mark 1st occurence in addition
T(idx)   = m;
end

[sakshi chopra]

Thanks for the help , but this doesn't solve my problem. If possible please suggest some another solution, i have tried to clarify my problem again.