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The Indicator Builder code
z=Cum(1);Lz=LastValue(z);zz=0.01*(Lz-z-200);
a=IIf(z>=Lz-400,1,Null);
x=-a*zz;
y=x^2-3/4;
Plot(x,"x",1,1);Plot(y,"y",1,1);
Plot(a*0,"",1,1);Plot(z==Lz-200,"",1,2+styleOwnScale);
will reproduce the graphs of y=x, y=x^2-3/4 in the range [-2,2] wit a
0.01 step for x.
A stock history >400 bars is required.
Dimitris
--- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
wrote:
>
> AFL structure helps to reproduce the tables of
> http://www.hypertextbook.com/chaos/11.shtml
> The initial function is applied 1, 5, 10, 50, 100, 500 and 1000
times
> [!!]
> In an Indicator builder window paste the
>
> Title="The orbits of 9 seeds of the f(x)=x^2+1/4";
> function f1(x)
> {return x^2+1/4;}
> function f5(x)
> {return f1(f1(f1(f1(f1(x)))));}
> function f10(x)
> {return f5(f5(x));}
> function f50(x)
> {return f10(f10(f10(f10(f10(x)))));}
> function f100(x)
> {return f50(f50(x));}
> function f500(x)
> {return f100(f100(f100(f100(f100(x)))));}
> function f1000(x)
> {return f500(f500(x));}
> for(i=-1;i<=1;i=i+0.25)
> {
> Title=Title+"\ni="+
> WriteIf(i>=0," ","")+WriteVal(i,1.2)+
> WriteIf(f1(i)>0," "," ")+WriteVal(f1(i),1.3)+
> WriteIf(f5(i)>0," "," ")+WriteVal(f5(i),1.3)+
> WriteIf(f10(i)>0," "," ")+WriteVal(f10(i),1.3)+
> WriteIf(f50(i)>0," "," ")+WriteVal(f50(i),1.3)+
> WriteIf(f100(i)>0," "," ")+WriteVal(f100(i),1.3)+
> WriteIf(f500(i)>0," "," ")+WriteVal(f500(i),1.3)+
> WriteIf(f1000(i)>0," "," ")+WriteVal(f1000(i),1.3);
> }
>
> and, with a few changes, in a new IB window, paste the
>
> Title="The orbits of 15 seeds of the f(x)=x^2-3/4";
> function f1(x)
> {return x^2-3/4;}
> function f5(x)
> {return f1(f1(f1(f1(f1(x)))));}
> function f10(x)
> {return f5(f5(x));}
> function f50(x)
> {return f10(f10(f10(f10(f10(x)))));}
> function f100(x)
> {return f50(f50(x));}
> function f500(x)
> {return f100(f100(f100(f100(f100(x)))));}
> function f1000(x)
> {return f500(f500(x));}
> for(i=-1.75;i<2;i=i+0.25)
> {
> Title=Title+"\ni="+
> WriteIf(i>=0," ","")+WriteVal(i,1.2)+
> WriteIf(f1(i)>0," "," ")+WriteVal(f1(i),1.3)+
> WriteIf(f5(i)>0," "," ")+WriteVal(f5(i),1.3)+
> WriteIf(f10(i)>0," "," ")+WriteVal(f10(i),1.3)+
> WriteIf(f50(i)>0," "," ")+WriteVal(f50(i),1.3)+
> WriteIf(f100(i)>0," "," ")+WriteVal(f100(i),1.3)+
> WriteIf(f500(i)>0," "," ")+WriteVal(f500(i),1.3)+
> WriteIf(f1000(i)>0," "," ")+WriteVal(f1000(i),1.3);
> }
>
> Glenn Elert, the author of this interesting book, writes :"...if
you
> wait long enough..."
> The AFL time is ~2sec and it is not bad at all !!
>
> Dimitris
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