Help in optimizing a for loop in matlab
- by HH
I have a 1 by N double array consisting of 1 and 0. I would like to map all the 1 to symbol '-3' and '3' and all the 0 to symbol '-1' and '1' equally. Below is my code. As my array is approx 1 by 8 million, it is taking a very long time. How to speed things up?
[row,ll] = size(Data);
sym_zero = -1;
sym_one = -3;
for loop = 1 : row
if Data(loop,1) == 0
Data2(loop,1) = sym_zero;
if sym_zero == -1
sym_zero = 1;
else
sym_zero = -1;
end
else
Data2(loop,1) = sym_one;
if sym_one == -3
sym_zero = 3;
else
sym_zero = -3;
end
end
end
