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Dimitris,
Excellent. And thanks. The applications of this idea of screening
any array, for any condition, and generating new array based on it
are important.
Regards,
- Salil V Gangal
--- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
wrote:
> The question is more general and has a lot of applications.
> Example 1
> To create an array with the historical Close values when StochD()
> crosses 50.
>
> Cond=Cross(StochD(),50);
> Ctue=ValueWhen(Cond,C);
> Plot(Ctue,"Ctue",1,1);
> num=LastValue(Cum(Cond));L1=LastValue(Cum(1))-1;
> j=L1-num;g=0;
> for(i=0;i<BarCount;i++)
> {
> if(Cond[i]==1)
> {
> g[j]=Ctue[i];j=j+1;
> }
> }
> Plot(g,"g",2,2);
>
> The elements were placed at the end.
> Example 2
> To create an array with the historical RSI() values when MACD()
> crosses its Signal().
>
> Cond=Cross(MACD(),Signal());
> Ct=ValueWhen(Cond,RSI());
> Plot(Ct,"Ct",1,1);
> num=LastValue(Cum(Cond));
> j=0;g=0;
> for(i=0;i<BarCount;i++)
> {
> if(Cond[i]==1)
> {
> g[j]=Ct[i];j=j+1;
> }
> }
> Plot(g,"g",2,2);
> Filter=Cond;
> AddColumn(Ct,"Ct");
>
> The elements were placed in the beginning.
>
> In other words, as you see from the last example, we actually
create
> an array with the results of the exploration
> Filter=Cond;
> It is another way to save the results of an exploration for any
> further use.
> Since these results form a new array, we may also apply any
> transformation, MA(g,10), RSIa(g,5) etc.
> It is interesting.
> Dimitris Tsokakis
>
> --- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS"
<TSOKAKIS@xxxx>
> wrote:
> > Salil,
> > Let the new array be g. In IB you may have
> >
> > Cond=DayOfWeek()==2;
> > Ctue=ValueWhen(Cond,C);
> > Plot(Ctue,"Ctue",1,1);
> > j=0;g=0;
> > for(i=0;i<BarCount;i++)
> > {
> > if(Cond[i]==1)
> > {
> > g[j]=Ctue[i];j=j+1;
> > }
> > }
> > Plot(g,"g",2,2);
> >
> > The array g will have the Tuesdays values for the first LastValue
> (Cum
> > (Cond)) elements. The rest are filled with zeros[or any other
> value].
> > If you want to move g at the end, then it should begin from the
> > (L1-num) th element with
> >
> > Cond=DayOfWeek()==2;
> > Ctue=ValueWhen(Cond,C);
> > Plot(Ctue,"Ctue",1,1);
> > num=LastValue(Cum(Cond));L1=LastValue(Cum(1))-1;
> > j=L1-num;g=0;
> > for(i=0;i<BarCount;i++)
> > {
> > if(Cond[i]==1)
> > {
> > g[j]=Ctue[i];j=j+1;
> > }
> > }
> > Plot(g,"g",2,2);
> >
> > Dimitris Tsokakis
> > --- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS"
> <TSOKAKIS@xxxx>
> > wrote:
> > > Salil,
> > > cond=Dayofweek()==2;
> > > num=lastvalue(cum(cond));
> > > will give the length of this new array.
> > > Dimitris Tsokakis
> > > --- In amibroker@xxxxxxxxxxxxxxx, "Salil V Gangal"
> > > <salil_gangal@xxxx> wrote:
> > > > Friends,
> > > >
> > > > I have a data-series, say Nasdaq Composite closing values
> (^IXIC)
> > > in
> > > > AmiBroker, then is there a way I can create an array based on
> > this
> > > > data-series of Nasdaq, which has in it the closing values of
> only
> > > > Tuesday's using AFL, within Indicator Builder ? If Tuesday's
> > data
> > > is
> > > > not present, then next day's data is to be taken instead.
> > > >
> > > > Regards,
> > > > - Salil V Gangal
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