Is it possible to vectorize this loop?

Hi,

I've been trying to figure out a way to optimize this bit of code by vectorizing the loop. I can't find a good way to do it--maybe it's not possible given the conditional used. In the actual program the array will contain 80,000+ elements so I'm trying to speed things up.

Thanks, Charles

%Test Array
  A =[1 2 3 4 5 6;4 5 6 5 6 7;7 8 9 10 11 12;];
  B=sum(A,1);
  C=mean(B);
  E=30*C/100;
  F=and(B>=C-E,B<=C+E);
  for i=1:2:length(F)-1    
      if or(F(i)==0,F(i+1)==0)   
       F(i)=0;
       F(i+1)=0;  
     end
  end
  G=B(F);

Answer 1

[Azzi Abdelmalek]

A =[1 2 3 4 5 6;4 5 6 5 6 7;7 8 9 10 11 12;];
B=sum(A,1);
C=mean(B);
E=30*C/100;
F=and(B>=C-E,B<=C+E);
F=repmat(all(reshape(F,2,[])),2,1)
F=F(:)'

Answer 2

[Andrei Bobrov]

F = kron(all(reshape(F,2,[])),[1 1]);