Re: Declare variable for future use: Left/Right side of the formula

["mik954" <mik-u@xxxx>]

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/ 
> > 
> > 
> >