how do I apply an if statement to each row of a column vector?

i have a 1x10 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 1x10 column vector consisting of either +1 or -1

any help is appreciatied, thanks.

Answer 1

[Sudhakar Shinde]

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

[Ben Newton]

thanks for your help

[Sudhakar Shinde]

Welcome. Glad to help.