I'm looking to multiply elements of a vector by their respective index. Right now, I'm using the following code (variable names simplified and shortened):
for a = 0:Points-1
for b = 0:Points-1
ary1( a+1 ) = ary1( a+1 ) + ary2( b+1 ) * exp( i*a*b/Points );
I'd like to be able to change this into a vector operation in either direction, such as
for a = 0:Points-1
ary1( a+1 ) = ary1( a+1 ) + ary2 .* exp( i*a*b/Points );
The problem, of course, is that b no longer exists, nor can I make something that is a function of a that returns the appropriate b.
If it's relevant, the specific purpose of this code is DFT implementation. I do realize that MATLAB provides FFT as a built-in function, however, I need specific control that I can't get with the FFT functions provided with MATLAB.
Hopefully my question makes sense. Thank you for your time.
