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Bruce
Thanks for the response.
After reading it, something seemed missing, so I read my initial question.
To restate the issue, the program works but takes far too long because of
the repeated disk read operations.
I realize now my point was not stated clearly.
My reason for desiring Static arrays is that I would have to read the disk
info only once and save it in the Static Array. This should save a lot of
time.
Appreciate any further comments
Ara
----- Original Message -----
From: "bruce1r" <brucer@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Saturday, June 23, 2007 8:46 AM
Subject: [amibroker] Re: VBScript / Jscript
> Ara -
>
> I only check in here occasionally, but found your question, and it
> relates to some things that I've done in the past, so I'll try to
> share what I found.
>
> Bottom line - ATC's are roughly as fast as any alternate,
> off-the-shelf solution since they operate out of the ticker memory
> cache - just a little messier if you have you are managing a large
> number of results.
>
> ATC addresses the main problem in an WL explore, though, because it
> performs array truncation and alignment. That issue is this - as each
> ticker is looped through, a new default array length with entry dates
> is defined. This applies to all arrays created in that pass. For
> example, if you had a WL of two tickers - say the RUT-I and UCPIX in
> the FT database, the default array would have a start date of 9/1/88
> for the RUT-I and a start date of 1/29/04 for UCPIX. SO if you could
> create a static indicator array for the SP-CP ticker and then tried to
> read it when the UCPIX ticker was executed - it would be too long and
> start at the wrong date. ATC's and Foreign's truncate if necessary
> and align dates. The alignment is even more important if you mix data
> from foreign markets that have different market dates and holidays.
>
> If you're still convinced that you need a way to do static arrays and
> are willing to use modified settings, let me know and I'll find some
> time later to write it up.
>
> -- Bruce R.
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Ara Kaloustian" <ara1@xxx> wrote:
>>
>> One my issues with Amibroker is the lack of static arrays ... I know
> it's coming, but ... I have a backtest that uses sector data stored in
> ATCs.
>>
>> Question I have:
>>
>> If I use jscript or VB script, can I do something like this (below)
> so that once I define arrays, they stay defined?
>>
>> Code below to be called only once using #include_once command
>>
>> Start script
>> Declare arrays
>> Read disk
>> Assign info from disk read to script arrays
>>
>> continue with rest of code
>> call arrays from memory when needed
>>
>>
>> The intent is to avoid reading disk for every symbol I process
> during backtest
>>
>> TIA
>>
>> Ara
>>
>
>
>
>
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