I have a column list of complex numbers (about 200k long). I want to switch all the real and imaginary parts. I'm pretty sure there is a single multiplication I can do to accomplish this, but I can't find a formula online. This is the best way I've found so far but it's too slow for my needs (it needs to run realtime):
>> vec = [complex(1,11);complex(2,22);complex(3,33)]
vec =
1.0000 +11.0000i
2.0000 +22.0000i
3.0000 +33.0000i
>> complex(imag(vec),real(vec))
ans =
11.0000 + 1.0000i
22.0000 + 2.0000i
33.0000 + 3.0000i
I'm not sure if there is a built-in operation for this, but I do see a speed increase by not using complex
function:
>> imag(vec) + real(vec)*1i
ans =
11.0000 + 1.0000i
22.0000 + 2.0000i
33.0000 + 3.0000i
and also this way
>> conj(vec)*1i
ans =
11.0000 + 1.0000i
22.0000 + 2.0000i
33.0000 + 3.0000i
which I think looks a lot cleaner.