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of course, thanks
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From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of Fred
Sent: Wednesday, 1 November 2006 6:07 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Re: Help with Tomasz's Example on FFT
It's plotting the cycle itself ...
--- In amibroker@xxxxxxxxx <mailto:amibroker%40yahoogroups.com> ps.com,
"Paul Ho" <paultsho@xxx> wrote:
>
> Hello,
>
> I've been going over Tomasz's example on FFT that he published on
with the
> release of 4.87 beta.
>
> So far so good with the exception of the last plot statement
>
>
>
> Plot( cos( phase[ sbar * 2 ] + (sbar) * x1 * 2 * 3.1415926 / Len ),
>
> " dominant cycle "+ Len/(sbar) + "(" + sbar + " bin) bars",
colorBlue,
> styleOwnScale );
>
>
>
> It seems that this statement is plotting the weighting factor of
the fourier
> transform
>
>
>
> Wk = cos(2ðk/N + ö)
>
> Where ö is the phase angle and k is the no of harmonics in the
series.
>
> If this is the case, how is it related to the dominant cycle.
>
>
>
> Any explanations will be greatly appreacriated.
>
>
>
> Thanks
>
> Paul.
>
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