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Mike,
In fact in ANY language you should not use a variable without initializing it first.
But as to the problem - it would be better if you explain in plain english
what do you want to achieve, then it will be possible to write the code.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "mik954" <mik-u@xxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, April 23, 2002 3:50 PM
Subject: [amibroker] Re: Declare variable for future use: Left/Right side of the formula
> Tomasz,
>
> Thank you for the links describing AFL arrays.
>
> But I still don't know how I can benefit from AMA/AMA2 functions to
> fix my problem.
>
> The problem is how to obtain a value from an array using ValueWhen()
> function (on the right side of the formula) before setting/defining
> this array on the left side of the formala.
>
> In Excel I don't need to declare any rows/columns: they are all
> predefined. Therefore I can use any new row/column on the left and
> right side of the formula at any time.
>
> As I understand in AFL I CANNOT use an array on the right side of the
> formula before using it on the left side.. That's my PROBLEM.
>
> A simle fix would be using some kind of declaration (var for example,
> like in VB/JS Script) to allow using of array on the right side of
> the formula.
>
> Thanks,
> Mike
>
>
>
>
>
> --- In amibroker@xxxx, "Tomasz Janeczko" <amibroker@xxxx> wrote:
> > Mike,
> >
> > There are numerous possibilities to reference previous value of the
> indicator or any array.
> > Please check out http://www.amibroker.net/boards/viewtopic.php?t=81
> for the details.
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> > ----- Original Message -----
> > From: "mik954" <mik-u@xxxx>
> > To: <amibroker@xxxx>
> > Sent: Tuesday, April 23, 2002 2:15 AM
> > Subject: [amibroker] Re: Declare variable for future use: No way in
> AFL?
> >
> >
> > > Tomasz,
> > >
> > > You mean that I cannot use REF() function to get a previous
> element
> > > of an ARRAY mentioned later in the code?
> > >
> > > So in AFL there is no way to use a previous value of a variable
> to
> > > define its new value? What a disappointment. Is there any
> workaround?
> > >
> > > Thanks,
> > > Mike
> > >
> > >
> > > --- In amibroker@xxxx, "Tomasz Janeczko" <amibroker@xxxx> wrote:
> > > > Mike,
> > > >
> > > > No, AFL operates on entire arrays and it uses only single-pass
> to
> > > process all bars.
> > > > So if you assign a value later in your code it will have no
> effect
> > > on any lines that appeared
> > > > before.
> > > >
> > > > Best regards,
> > > > Tomasz Janeczko
> > > > amibroker.com
> > > > ----- Original Message -----
> > > > From: "mik954" <mik-u@xxxx>
> > > > To: <amibroker@xxxx>
> > > > Sent: Monday, April 22, 2002 6:13 PM
> > > > Subject: [amibroker] Declare variable for future use (was TJ:
> > > Actual trade profit vs. Theoretical)
> > > >
> > > >
> > > > > Hi, all!
> > > > >
> > > > > Well, so far no any response on my initial post (even on
> direct e-
> > > > > mail to support@xxxx). It's weird. Maybe my question wasn't
> > > > > clear, or Tomasz was too busy.
> > > > >
> > > > > OK, let me ask in a different way. Is there any way in AFL to
> > > declare
> > > > > variable/array and use its previos value before setting
> current
> > > one?
> > > > >
> > > > > I mean:
> > > > >
> > > > > // var tradeProfit; // declare variable for future use
> > > > >
> > > > > Buy = longEntry and ValueWhen(Sell, tradeProfit) < 0;
> > > > > Sell = LongExit;
> > > > >
> > > > > tradeProfit = ValueWhen(Sell, SellPrice) - ValueWhen(Buy,
> > > BuyPrice);
> > > > >
> > > > >
> > > > > Any suggestions are welcome.
> > > > >
> > > > > Thanks,
> > > > > Mike
> > > > >
> > > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
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