|
PureBytes Links
Trading Reference Links
|
Yes please,
I think a 'no sync' flag would be a lot of 'bang for the buck'.
Haven't downloaded and tried the beta yet but if they are not persistent, between sessions and databases, that would be good ... I would like to save a 'no sync' calculated array and reference it again at a later date..... like an ~ATC in the sym list but not necessarily visible.
I think it is a way to bypass writing to files ... much quicker too.
--- In amibroker@xxxxxxxxxxxxxxx, Dennis Brown <see3d@xxx> wrote:
>
> Tomasz,
>
> I would welcome your idea of a "nosync" flag.
>
> Some of the uses I have for static arrays involve data that has no
> relation to time stamps. Other uses are for saving temporary results
> of calculations that are only needed once per parameter change on very
> large arrays (200K) for special case backtesting. The backtests are
> on one security in indicator mode with real time feed off. Speed is
> important as it can take 20-30 seconds for one AFL pass today without
> static arrays. It will take a while before processor speeds increase
> 30x.
>
> In these cases the extra overhead of matching time stamps would not be
> needed, and in the first case might actually create problems.
>
> Best regards,
> Dennis
>
> On Mar 7, 2009, at 4:08 AM, Tomasz Janeczko wrote:
>
> > Hello,
> >
> > In that case it will work because timestamps are in sync.
> >
> > In the future I may consider adding "nosync" flag, that will skip
> > any timestamp matching logic for such simple scenarios.
> >
> > Generally speaking static array variables are designed to "do their
> > best" to synchronize to selected symbol even if there is no match.
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> > ----- Original Message -----
> > From: J. Biran
> > To: amibroker@xxxxxxxxxxxxxxx
> > Sent: Saturday, March 07, 2009 8:08 AM
> > Subject: RE: [amibroker] AmiBroker 5.24.0 BETA released .Static
> > array variables implemented!
> >
> > Hi TJ,
> > Would you care to clarify comment d) below in the case of trying to
> > import output of one indicator from one pane to a second pane of
> > same symbol and same interval when the interval is Range bars.
> > Will it not work in that case?
> >
> > --
> >
> > Joseph Biran
> > ____________________________________________
> >
> > From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
> > On Behalf Of Tomasz Janeczko
> > Sent: Friday, March 06, 2009 6:59 AM
> > To: amibroker@xxxxxxxxxxxxxxx
> > Subject: [amibroker] AmiBroker 5.24.0 BETA released ?Static array
> > variables implemented! (do NOT work well for tick/volume intervals!)
> >
> > Hello,
> >
> > AmiBroker 5.24.0 BETA is released now:
> > http://www.amibroker.com/devlog/2009/03/06/amibroker-5240-beta-released/
> >
> > This is somewhat special beta because it contains only one fix and
> > introduces only one new feature: array static variables.
> > I decided to release this feature "alone" because the static
> > variable code has been completely rewritten, so in case of any
> > issues, it would be easy to revert to 5.23.
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> > d) static array variables do not work well for non-time based
> > intervals (tick/n-volume/n-tick) because timestamps in those intervals
> > may not be unique (i.e. several bars may have same time stamp), so
> > time synchronization is not reliable.
> >
> >
> >
> >
> >
>
------------------------------------
**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
TO GET TECHNICAL SUPPORT send an e-mail directly to
SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
(submissions sent via other channels won't be considered)
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/amibroker/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:amibroker-digest@xxxxxxxxxxxxxxx
mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|