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Dear Tom,
As I wrote some time ago AmiBroker is array-based
language. This means that single statement can process
the whole array in one run.
Statements are executed once, line by line.
There is a nice article by Geoff Mulhall in newsletter 9/2001
(http://www.amibroker.com/newsletter/09-2001.html)
explaining the way AFL works.
Best regards,
Tomasz Janeczko
===============
AmiBroker - the comprehensive share manager.
http://www.amibroker.com
----- Original Message -----
From: "Tom McDaniel" <tmtempe@xxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, August 28, 2001 4:13 PM
Subject: Re: [amibroker] Re: Any Trade Station Coders Out There?
> Dimitris-
>
> Thanks for your interest and help.
>
> When I couldn't get "<>" to work I "brute forced" the comparison. Later
> I found the "!=" comparison operator in the documentation. Thanks.
>
> I presume the second instance of arc tangent should be converted from
> radians to degrees as well. Is the line
>
> "Phase = Iif(I1 != 0, 57.3 * Atan(Q1/I1), Phase);"
>
> appropriate for this? (If I do this it appears to create large
> oscillations in the MAMA and FAMA so something must still be wrong!)
>
> I remain concerned about the initialization of variables and the
> sequence of the calculations (Your initial comment) I basically
> converted the TradeStation code line by line. I am unclear about the
> order that is required in AFL. Does AFL process each line of code for
> every bar sequentially and then proceed to the next line of code? If
> so, then the order of the calculations definitely needs to be rearranged
> so that all of the predecessor calculations are done first before they
> are called If, on the other hand, the entire AFL code is run for each
> day in sequence then the current order seems acceptable because Var(-x)
> will have been computed x passes before.
>
> The TradeStation code appears to be an implied loop as the first line is
>
> "If CurrentBar > 5 then begin"
>
> and the final line is "End;". There is no explicit incrementation of
> this loop but this implies to me that TradeStation goes through the
> entire code before stepping to the next bar.
>
> AFL seems to require and accept the initialization that I did to run but
> maybe the initialization that I have done is incorrect. What is the
> correct way to do this?
>
> Best regards and thanks for your help.
> -Tom McDaniel
>
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