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hi,
this is one way to do it (the AddColumn is just for testing purposes):
function fff(n) {
return log(C/Ref(C,-n))/(StDev(log(C/Ref(C,-1)),n)*sqrt(n));
}
function ggg(n) {
g = 0;
if (n >= 10) {
for (i = 10; i <= n; i++) {
g = g + fff(i);
}
}
return g;
}
Filter = 1;
AddColumn(ggg(10),"ggg(10)");
AddColumn(ggg(11),"ggg(11)");
AddColumn(ggg(12),"ggg(12)");
--- In amibroker@xxxxxxxxxxxxxxx, "treliff" <treliff@xxxx> wrote:
> Thanks Graham,
>
> I tried your suggestion but changing "g" to "gr" within the code is
> not the solution since now it returns a syntax error re. "gr(10)".
> The problem is in the brackets I think but I wouldn't know how to
> code without brackets to initiate the loop.
>
> Possibly indeed the use one function within another is a problem,
> though I suspect this should be possible.
>
> Treliff
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Graham" <gkavanagh@xxxx> wrote:
> > I think the problem comes that you are using the functioning you
> are trying
> > to define within the function itself. Try changing that g()
inside
> the
> > function. Also I am not sure if you can use another function
> within a
> > function ie f(n) within g(n) ?
> >
> > function g(n)
> > {
> > gr(10) = f(10);
> > for (n=11;n<=30,n++)
> > {
> > gr(n) = gr(n-1) + f(n);
> > }
> > return gr(n);
> > }
> >
> > Cheers,
> > Graham
> > http://e-wire.net.au/~eb_kavan/
> >
> > -----Original Message-----
> > From: treliff [mailto:treliff@x...]
> > Sent: Tuesday, March 09, 2004 4:04 PM
> > To: amibroker@xxxxxxxxxxxxxxx
> > Subject: [amibroker] I need some loop-programming help
> >
> > Hi,
> > I need some loop-programming help.
> >
> > I have already defined a function f(n) (n are integers 10,11,...)
> > and now I want to define function g(n) such that
> >
> > g(10) = f(10)
> > g(11) = f(10) + f(11)
> > g(12) = f(10) + f(11) + f(12)
> > ...
> > etc. say up to g(30)
> >
> > As a clumsy mathematician (not a programmer) I would write
> something
> > like:
> >
> > function g(n)
> > {
> > g(10) = f(10);
> > for (n=11;n<=30,n++)
> > {
> > g(n) = g(n-1) + f(n);
> > }
> > return g(n);
> > }
> >
> > but this is obviously wrong, the first syntax error is the use of
> > "g(10)" within the code.
> >
> > Can anyone help me get this code right? Thanks much in advance.
> >
> > PS
> > Though this seems irrelevant to my question, the function f is
> > defined as follows:
> >
> > function f(n)
> > {
> > return log(C/Ref(C,-n))/(StDev(log(C/Ref(C,-1)),n)*sqrt(n)) ;
> > }
> >
> >
> >
> >
> > Send BUG REPORTS to bugs@xxxx
> > Send SUGGESTIONS to suggest@xxxx
> > -----------------------------------------
> > Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> > (Web page: http://groups.yahoo.com/group/amiquote/messages/)
> > --------------------------------------------
> > Check group FAQ at:
> > http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> > Yahoo! Groups Links
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-----------------------------------------
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