Hi, I do not know what you really mean, but try to do the FT like this:
And check the phase.
>I have a problem in phase shift with Fourier transform: what I did is to create
a cosine function with known period, in example T@ and perform an FT on that
>FT give me correct period but phase is correct only if I perform FT on an
integer multiple data points, in example T@ and num.points 400 or any x*40.
>I get max phase shift (180�) with T/2, so in previous example performing FT
on 400 +(40/2) points.
>Is there anyone do know how can I get every time correct in phase no matter how
many points I do perform FT?
>Or does anybody knows if there are links, algorithms, codes that fix this
>Thanks in advance.