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Not familiar iwth the original code you refer to so can only make
rough statements and assistance. Best if you go back to original AB
code, can you refer that to me. I don't know other chart pacage
languages so not much use converting unless they are obvious. If in
members only area of AB site, then just send the link address to me
sometimes you should use the While function/statement. Unfortunately
not real knowledgeable on this, but maybe something
While(Value3<0.002)
{
etc
On 7/4/05, pakaypakay <pakaypakay@xxxxxxxxx> wrote:
> Graham,
> Thank you for trying to help with this. I guess I didn't get far
> enough to discover the mixed variable issue in the for statement.
> However, I think that can be easily remedied. The main problem seems
> to be how to get any loop statement to work using this criteria for
> exiting the loop: Value3 <= 0.002, where Value3 is calculated from
> Array values.
>
> I actually rewrote the code using the "for( i = Start; i < BarCount;
> i++)" approach, but having this loop nested within the main loop
> resulted in a inordinate amount of calculation time (although it did
> produce the desired result). So, I was hoping that someone has a
> better solution.
>
> The original code that I modified was taken from the S&C Trader's
> Tips - Issue 3, 2005 (the AmiBroker code for Ehler's Median-Average
> Adaptive Filter). However, that original code deviates slightly from
> the algorithm presented in the S&C magazine article, shown in Easy
> Language format. The Amibroker code results in a substantially
> different adaptive moving average, so I was hoping to get closer to
> Ehler's version, which determines the Length value used to calculate
> alpha by exiting this loop when Value3 is less than or equal to the
> specified threshold of 0.002.
>
> pakay
>
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@xxxx> wrote:
> > to start with compare the basic statement construction with those in
> > the help files
> >
> > for( Value3 = 0.2; Value3 > 0.002; Length = Length - 2 )
> > This should have the same variable in each part
> > you cannot mix Value3 and length, so which one should it be?
> >
> > Then insode the loop the variables need to be identified against the
> > basic for variable
> >
> > Perhaps you should explain what exactly you are trying to achieve
> with
> > the code so we can help with creating it
> >
> > On 7/4/05, pakaypakay <pakaypakay@xxxx> wrote:
> > > Does anyone know how to work around this problem? Since the loop
> > > statement does not allow array type variables (Value3), this code
> > > will not work.
> > >
> > >
> > > Price = ( H + L ) /2;
> > > Smooth = (Price + 2 * Ref( Price, -1 ) + 2 * Ref( Price, -2 ) +
> Ref(
> > > Price, -3 ) )/6;
> > >
> > >
> > > Length = 39;
> > >
> > > for( Value3 = 0.2; Value3 > 0.002; Length = Length - 2 )
> > > {
> > > alpha = 2 / ( Length + 1 );
> > >
> > > Value1 = Median( Smooth, Length );
> > > Value2 = AMA( Smooth, alpha );
> > >
> > > Value3 = Nz( abs( Value1 - Value2 )/Value1 );
> > >
> > > }
> > >
> > > AvgLength = IIf( Length < 3, 3, Length );
> > > AvgAlpha = 2 / (AvgLength + 1);
> > >
> > > Filt = AMA( Smooth, AvgAlpha);
> > >
> > > Plot( C, "Price", colorBlack, styleBar );
> > > Plot( Filt, "Filt", colorRed, styleThick );[/code]
> > >
> > >
> > >
> > >
> > > 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! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > --
> > Cheers
> > Graham
> > http://e-wire.net.au/~eb_kavan/
>
>
>
>
>
> 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! Groups Links
>
>
>
>
>
>
>
--
Cheers
Graham
http://e-wire.net.au/~eb_kavan/
Please note that this group is for discussion between users only.
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