Patrick, Just feel free to suggest what you need in feedback center http://www.amibroker.com/feedback/
Describe what you need and the way you would like it to use (because I would like to hear not only about "functions/features" but also (most importantly) about "the goal") Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "vlanschot" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, October 08, 2006 1:04 PM Subject: [amibroker] Re: Polynomial Trendlines > Look forward to it TJ. Just wondered whether you've considered > developing something for wavelets instead of the "old" FFTs? > > PS > > --- In [email protected], "Tomasz Janeczko" <[EMAIL PROTECTED]> > wrote: >> >> For that you need Fourier transform and FFT is coming as a built > in function in 4.86 >> >> Best regards, >> Tomasz Janeczko >> amibroker.com >> ----- Original Message ----- >> From: "Fred" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Sent: Friday, October 06, 2006 3:48 AM >> Subject: [amibroker] Re: Polynomial Trendlines >> >> >> > Now if someone can take this method and/or AFL or at least > provide a >> > how to that takes us into Trigometric curve fitting and > extrapolation >> > i.e. the solution of simultaneous equations in the generalized > format >> > of a spectral model i.e. ... >> > >> > S ~ (a1 cos w1t + b1 sin w1t) + ... + (Am cos wm + bm sin wmt) >> > >> > Then we might have something fairly useful ... >> > >> > I suspect Gaussian Elimiation can be used for this as well, but > I >> > don't have the skill level to calculate the necessary matrix > entries >> > to get it down ... >> > >> > Any mathematicians out there ? >> > >> > >> > --- In [email protected], "Fred" <ftonetti@> wrote: >> >> >> >> When stretch over enough data almost any order will become a > pseudo >> >> straight line ... >> >> >> >> By their nature a first order IS a straight line, 2nd U shape, > 3rd >> >> order sine wave etc ... >> >> >> >> Try highlighting a SMALLER segment of data by using the > beginning >> > and >> >> ending range markers ... >> >> >> >> >> >> --- In [email protected], "d_hanegan" <dhanegan@> wrote: >> >> > >> >> > Fred: >> >> > >> >> > Thanks for your posts and all of the information concerning > the >> >> > Polynomial Trendlines. When I run the code, I pretty much > just >> > get >> >> > a straight green line; it does not fit my data. I thought I > had >> >> > read all of the posts. Am I missing something? >> >> > >> >> > Thanks. >> >> > >> >> > Dan >> >> > --- In [email protected], "Fred" <ftonetti@> wrote: >> >> > > >> >> > > Be AWARE ... that was a hand picked image ... if you play > with >> >> > > PolyFit you will see that sometimes data fits the >> > extrapolations, >> >> > > sometimes it doesn't. >> >> > > >> >> > > The higher the order, the flakier the extrapolations are > likely >> >> to >> >> > > become ... >> >> > > >> >> > > So ... Remember what it is ... a generator of an equation > in >> > the >> >> > form >> >> > > >> >> > > Y = a + bx + cx^2 + ... + nx^(n-1) >> >> > > >> >> > > Where the coeeficients were pick to fit the data. >> >> > > >> >> > > IMHO what PolyFit is, epecially with very high orders is a > very >> >> > good >> >> > > detrender of IN SAMPLE data, nothing more, nothing less ... >> > That >> >> > in >> >> > > and of itself is a useful tool ... Gaussian Elimination can >> > also >> >> > be >> >> > > the basis for some other things that are pretty decent when > the >> >> > order >> >> > > is kept fairly low i.e. 3 or 4 ... >> >> > > >> >> > > --- In [email protected], "Ara Kaloustian" <ara1@> >> > wrote: >> >> > > > >> >> > > > Polynomial TrendlinesFred, >> >> > > > >> >> > > > There have been a lot of posting on this subject. Your > one >> >> > image >> >> > > however is a very powerful message of its potential. >> >> > > > >> >> > > > Now I have to go back and review all the post ... hoping > to >> >> find >> >> > a >> >> > > good reference to study. >> >> > > > >> >> > > > Anyone using it succesfully now? >> >> > > > >> >> > > > Ara >> >> > > > ----- Original Message ----- >> >> > > > From: Fred Tonetti >> >> > > > To: [email protected] >> >> > > > Sent: Tuesday, October 03, 2006 3:32 PM >> >> > > > Subject: [amibroker] RE: Polynomial Trendlines >> >> > > > >> >> > > > >> >> > > > Oops . >> >> > > > >> >> > > > >> >> > > > >> >> > > > Meant to include this visual . >> >> > > > >> >> > > > >> >> > > > >> >> > > > Green is calculated . White is extrapolated . >> >> > > > >> >> > > > >> >> > > > >> >> > > > >> >> > > > >> >> > > > >> >> > > > >> >> > > > ---------------------------------------------------------- > ---- >> > -- >> >> - >> >> > --- >> >> > > ---------- >> >> > > > I am using the free version of SPAMfighter for private >> > users. >> >> > > > It has removed 8588 spam emails to date. >> >> > > > Paying users do not have this message in their emails. >> >> > > > Try SPAMfighter for free now! >> >> > > > >> >> > > >> >> > >> >> >> > >> > >> > >> > >> > >> > >> > Please note that this group is for discussion between users only. >> > >> > To get support from AmiBroker please send an e-mail directly to >> > SUPPORT {at} amibroker.com >> > >> > For other support material please check also: >> > http://www.amibroker.com/support.html >> > >> > >> > Yahoo! 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