Looping through S and creating a temporary array every 5 values should do the trick.
for i=1:5:length(S)
temp=S(i:i+4);
[Max,MaxIdx]=max(temp);
[Min,MinIdx]=min(temp);
for n=1:5
index=i+n-1;
code(index)=0;
if n>=MinIdx & n<=MaxIdx || n<=MinIdx & n>=MaxIdx
if MaxIdx > MinIdx
code(index)=1;
else if MinIdx > MaxIdx
code(index)=2;
end
end
end
end
code
end
