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Tomasz,
it is clear, thank you very much.
Dimitris Tsokakis
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <amibroker@xxxx>
wrote:
> Dimitris,
>
> There are three data types in AFL: number, string and array (of
numbers).
> There is no array of strings therefore there are no "previous"
values of
> strings.
> WriteIf converts "CURRENT" value of array (actually the value of
array element
> that corresponds to currently selected bar (or last bar in AA))
> to single string. Such string variable holds just one single
instance of
> string.
> Your 's' variable has only ONE value that depends on which condition
> is met on selected bar.
>
> In commentary it is the same but when you move the selection
> line entire formula is re-evaluated therefore you can see
> the values for other 'current' bars.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Saturday, May 03, 2003 5:51 PM
> Subject: [amibroker] Re: A simlpe question
>
>
> > Tomasz,
> > Below defined s is a string :
> > s=WriteIf(StochD()<30,"o/s",WriteIf(StochD()>=30 AND StochD()
> > <70,"congestive","o/b"));
> > with 3 "values"[to call somehow the result of s].
> > In AA, AFAIK, we can not see these "values", the exploration
> > s=WriteIf(StochD()<30,"o/s",WriteIf(StochD()>=30 AND StochD()
> > <70,"congestive","o/b"));
> > Filter=1;
> > AddTextColumn(s,"");
> > for all quotations will give "o/b" or "congestive" or "o/s"
according
> > to the last s value.
> > In commentary window, the same s will give the proper value per
day.
> > I want to read in the same commentary a result like
> >
> > ^NDX today is o/b
> > Yesterday was congestive .
> > I have one solution that works fine
> >
> > Name()+" today is "+WriteIf(StochD()<30,"O/S. ",WriteIf(StochD()
>=30
> > AND StochD()<70,"congestive. ","O/B. "));
> > "Yesterday was "+WriteIf(Ref(StochD(),-1)<30,"O/S. ",WriteIf(Ref
> > (StochD(),-1)>=30 AND Ref(StochD(),-1)
<70,"congestive. ","O/B. "));
> >
> > and I thought if it is possible to have a simpler "Ref(s,-1)" for
the
> > previous "value" of a string s.
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko"
<amibroker@xxxx>
> > wrote:
> > > Dimitris,
> > >
> > > Use
> > > WriteVal( Ref( DateTime(), -1 ), formatDateTime );
> > >
> > > There is no such thing like "previous value of string".
> > > String has one value.
> > >
> > > Only arrays can have multiple values (one value per bar).
> > >
> > > Best regards,
> > > Tomasz Janeczko
> > > amibroker.com
> > >
> > > ----- Original Message -----
> > > From: "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
> > > To: <amibroker@xxxxxxxxxxxxxxx>
> > > Sent: Saturday, May 03, 2003 2:17 PM
> > > Subject: [amibroker] Re: A simlpe question
> > >
> > >
> > > > Anthony,
> > > > thank you for your replies.
> > > > To be more specific, I was asking for the previous value of a
> > srting,
> > > > like Date().
> > > > DT
> > > > --- In amibroker@xxxxxxxxxxxxxxx, "Anthony Faragasso"
> > <ajf1111@xxxx>
> > > > wrote:
> > > > > Dimitri,
> > > > >
> > > > > There are a couple of options....
> > > > >
> > > > > load into Guru Commentary...
> > > > >
> > > > > x=DateTime();
> > > > > WriteVal(Ref(x,-1),formatDateTime);
> > > > >
> > > > > OR
> > > > >
> > > > > writeval(ref(datenum(),-1),1);
> > > > >
> > > > >
> > > > > Anthony
> > > > >
> > > > > -------Original Message-------
> > > > >
> > > > > From: amibroker@xxxxxxxxxxxxxxx
> > > > > Date: Saturday, May 03, 2003 7:18:46 AM
> > > > > To: amibroker@xxxxxxxxxxxxxxx
> > > > > Subject: [amibroker] A simlpe question
> > > > >
> > > > > How can I read in commentary window the previous date ?
> > > > > Ref(Date(),-1) does not work since Ref accepts array and
Date()
> > is
> > > > a
> > > > > string...
> > > > > DT
> > > > >
> > > > >
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