MATLAB: How to apply an if statement to each row of a column vector

if statementrandom number generatorvectors

i have a 1×10 column vector consisting of random numbers.
and i want to apply the following if statement to each number in the column vector. 
  if R < 0.5;
    step = -1; 
elseif R > 0.5; 
    step = 1;  
  end
where R is the column vector, and so the solution would be a 1×10 column vector consisting of either +1 or -1
any help is appreciatied, thanks.

Best Answer

Try this:
R = [0.1:0.1:1];
step=zeros(1,length(R(:)));
for n=1:length(R(:))
    if R(n)<0.5
        step(n)= -1;
    elseif R(n) > 0.5
        step(n) = 1;
    end  
end
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