[amibroker] The square-wave AFL approximation

["Dimitris Tsokakis" <TSOKAKIS@xxxxxxxxx>]

// The square-wave approximation 

x=BarIndex<FONT 
face=Verdana size=1>();
pi=4*atan(1<FONT 
face=Verdana size=1>);
T=50;
f=1/T;
y=0<FONT face="Times New Roman" 
size=2>;
<FONT face="Times New Roman" 
size=2>nmax=Param("nmax",1000,10,1000,10<FONT face=Verdana 
size=1>);<FONT 
face=Verdana size=1>
<FONT face="Times New Roman" 
size=2>for(n=1;n<nmax;n=n+2<FONT 
face="Times New Roman" size=2>)
{
y=y+1/n*sin(2<FONT 
face=Verdana size=1>*pi*f*n*x);
}<FONT face=Verdana 
size=1>
Plot(y,"SqW",1,8);
GraphXSpace=2<FONT face="Times New Roman" 
size=2>;
<FONT face="Times New Roman" 
size=2> 
For 
nmax>500 the noise fades out.
<FONT face="Times New Roman" 
size=2> 
Dimitris 
Tsokakis


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