How to write matlab code that result odd component zero?

I was given some random in time domain.now i get fourier transform to convert it in the frquency domain.what matlab code can be written so that when i plot it in the frequency domain I can make odd component zero?My sequence in frequency domain should give only even component.

Answer 1

[Nora Khaled]

%vector of random integers
v1=randi(10,10,1);
%find odd number and replace by zero
v2=v1;
v2(mod(v2,2)~=0)=0;

[v1,v2]

[Dipsikha Roy]

I have sequence in tym domain so fft must be done to convert the signal in frequency domain.