how to code i included in A

how to code " i included in A"

Answer 1

[Voss]

Maybe you can use ismember. (Here I'm using ii to avoid ambiguity with the imaginary unit 1i, a.k.a., i.)

ii = 3;
A = [1 2 3 4 5];
ismember(ii,A) % ii is in A

ans = logical
   1

ii = [6 7];
A = [2 4 6 8 10];
ismember(ii,A) % ii(1) is in A, ii(2) is not

ans = 1×2 logical array
   1   0