deleting number

i have values such as A=[12 20 1 5 69 70 21 50 46 52 87 83 11 21]

B=[ 70 50 12 83]

now i want to delete B values from A ,so i will have output as

C=[20 1 5 69 21 46 52 87 11 21 ]

Answer 1

[Andrei Bobrov]

[C1,ic] = setdiff(A,B)
[i1,i1] = sort(ic)
C = C1(i1)

OR

C = A(~ismember(A,B))

Answer 2

[Wayne King]

Hi, You can use intersect to get the indices of A that intersect with elements of B and then delete those.

   [C,IA,IB] = intersect(A,B);
    A(IA) = [];

[kash]

wayne thanks a lot ,without using any in built command is it possible,using loops

[Oleg Komarov]

Sounds like a homework.

[Jan]

No, kask, it is impossible to do this "without built-in command", because all you can write in Matlab requires built-in commands. If your teacher told you to do this, ask him for thinking twice.