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When you loop through the price arrays the bars are identified with [ i ]
thus ref one bar in the past is [i-1]. I believe there is more explanation
within the hep files, under using loops etc
A simple MA is just Sum/Number eg Sum( C, 5 ) / 5
Cheers,
Graham
http://e-wire.net.au/~eb_kavan/
-----Original Message-----
From: treliff [mailto:treliff@xxxxxxxxx]
Sent: Friday, March 19, 2004 8:58 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Re: Looping stuff driving me nuts, please help...
This is close, at least there's a plot and very similar to the
regular MA though not completely.
Btw it is not an exponential but a simple mov.avg. i was trying to
define. The "formula" sure is o.k., the problem is in the coding (in
mine).
At first sight I don't get why it is necessary to use the subscript
[], need some time to digest.
Should you run into the exact match please do post it. Appreciate
your help.
treliff
--- In amibroker@xxxxxxxxxxxxxxx, "Graham" <gkavanagh@xxxx> wrote:
> This may be what you are seeking? Not an exact match for the EMA
but a
> starting point ?
>
> function MN(n)
> {
> // local result;
> result = C ;
> for (i=n-1;i<BarCount;i++)
> {
> result[i] = (n-1)/n*result[i-1] + (1/n)*C[i-n+1] ;
> }
> return result;
> }
> Plot(MN(2),"MN(2)", colorBlue);
>
> Plot(EMA(C,2),"MA(2)",colorRed);
>
> Cheers,
> Graham
> http://e-wire.net.au/~eb_kavan/
>
> -----Original Message-----
> From: treliff [mailto:treliff@x...]
> Sent: Friday, March 19, 2004 8:36 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Re: Looping stuff driving me nuts, please
help...
>
> perhaps i should add:
>
> I added the MA(C,2) as a visual check: if the MN code is correct
> than
> MN(2) = MA(C,2) the plots overlap
> and also
> MN(3) = MA(C,3)
> MN(4) = MA(C,4)
> etc.
>
> treliff
>
> --- In amibroker@xxxxxxxxxxxxxxx, "treliff" <treliff@xxxx> wrote:
> > Graham, would you mind to give me the full code including the
> > subscript operator as you use it?
> >
> > Herman, my plot shows the blue line completely different from
the
> > red. If the code is correct then they should overlap.
> >
> > treliff
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Graham" <gkavanagh@xxxx>
wrote:
> > > Should it be ?
> > >
> > > Result[i] = ((i-1)/i)*result[i-1] + (1/i)*Ref(C[i],-(i-1)) ;
> > >
> > > Cheers,
> > > Graham
> > > http://e-wire.net.au/~eb_kavan/
> > >
> > > -----Original Message-----
> > > From: treliff [mailto:treliff@x...]
> > > Sent: Friday, March 19, 2004 7:30 AM
> > > To: amibroker@xxxxxxxxxxxxxxx
> > > Subject: [amibroker] Looping stuff driving me nuts, please
> help...
> > >
> > > Looping stuff.... I've had some guidance from the forum and TJ
> > > and
> > > thought I got it, but every new loop I take on gets stuck.
> > >
> > > I went back to the basics, as an exercise trying to write a
> > function
> > > loop for a simple moving average:
> > >
> > > function MN(n)
> > > {
> > > // local result;
> > > result = C ;
> > > for (i=2;i<BarCount;i++)
> > > {
> > > result = ((i-1)/i)*result + (1/i)*Ref(C,-(i-1)) ;
> > > }
> > > return result;
> > > }
> > > Plot(MN(2),"MN(2)", colorBlue);
> > > Plot(MA(C,2),"MA(2)",colorRed);
> > >
> > > Just doesn't work, my MN(n) is empty for every n. What's
> > > wrong?
> > > Thanks for your patience with me.
> > >
> > > treliff
> > >
> > >
> > >
> > >
> > > Send BUG REPORTS to bugs@xxxx
> > > Send SUGGESTIONS to suggest@xxxx
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>
>
>
>
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