I should add that embedding JScript/_vbscript_ in formula
is old technology and was intended
as a way to support looping in very old and dark ages when
there was no native looping in
AFL. Now AFL allows everything that JScript/_vbscript_ and more
plus it is 10x faster
and there is absolutely NO reason to use JScript/_vbscript_
anymore. It is left here ONLY
to allow run legacy formulas.
No new code should use JScript/_vbscript_.
Second thing is that OLE AUTOMATION is intended to be used only FROM
OUTSIDE
of AmiBroker. Using it within formulas from inside AB, may inevitably lead
to "chicken and egg" (circular reference) problem
and is not supported.
It is important that OLE automation was always thought by Microsoft as a
method of controlling ONE application
from ANOTHER application.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
Sent: Tuesday, May 12, 2009 9:41 AM
Subject: Re: [amibroker] Re: How to pass
variables from AFL to embedded JScript?
Hello,
No you are not allowed to run scripting host
code within conditional _expression_.
The Microsoft SCRIPTING host is INDEPENDENT, i.e. it
executes on its own,
in parallel and its "global" parts are simply extracted
from the formula and run unconditionally
before actual AFL execution.
If you need to call something in script conditionally you
have two choices:
a) either write condition in JScript/_vbscript_
OR
b) write a FUNCTION in JScript/_vbscript_ and call that
function conditionally from AFL level
as shown below:
EnableScript( "jscript" );
<%
// NO global
code, only function definition
function
DoTheJob()
{
AB = new ActiveXObject(
"Broker.Application" );
AA = AB.Analysis;
}
%>
Test = 4;
if( Test ==
4
)
{
scr = GetScriptObject();
scr.DoTheJob();
}
Best regards,
Tomasz
Janeczko
amibroker.com
----- Original Message -----
Sent: Tuesday, May 12, 2009 7:36
AM
Subject: [amibroker] Re: How to pass
variables from AFL to embedded JScript?
Okay, this is bizarre. I am testing out some embedded JScript
for a related application to what I posted earlier. This one is not
happening within the AA, but is nonetheless still inside an AFL.
The
following simple code is fine, and does not generate a syntax
error:
//Test = 4;
//if ( Test == 4
)
//{
EnableScript( "jscript" );
<%
AB = new ActiveXObject( "Broker.Application" );
AA = AB.Analysis;
%>
//}
However, if I uncomment all the
"//" I get a syntax error.
Are we not allowed to call a JScript inside an IF block? If not, why
the heck not? And if we are allowed, why would it be generating a
syntax error in this simple case?
The error I get is on the "<%" --> probably missing semi colon on previous
line.
But the semi colon is clearly there.
Anyone's
two cents appreciated.
--- In amibroker@xxxxxxxxxxxxxxx,
"ozzyapeman" <zoopfree@xxx> wrote:
>
> Thanks for that
tip.
>
> Guess I will have to write a WF type routine in
JScript and call each optimize individually, from outside AA.
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko"
groups@ wrote:
> >
> > During any AA operation in
progress, you must not
> > use Analysis object to start another AA
operation
> > (because it is infinite nesting)
> >
> > Analysis object may only be used from OUTSIDE
> > of
AA.
> >
> > To run "suboptimization" use THE ONLY
supported
> > way, i.e. Optimizer API (see optimizer.html file in
the ADK subfolder).
> >
> > Best regards,
> >
Tomasz Janeczko
> > amibroker.com
> > ----- Original
Message -----
> > From: "ozzyapeman" zoopfree@
> > To:
amibroker@xxxxxxxxxxxxxxx
> > Sent: Tuesday, May 12, 2009 3:11
AM
> > Subject: [amibroker] Re: How to pass variables from AFL to
embedded JScript?
> >
> >
> > > And if there
is no way to pass variables directly from AFL to JScript,
> > >
can I first fput the AFL vars to some kind of log file, and then is
>
> > there a command in JScript that can pull those vars to use for
the
> > > Dates?
> > >
> > > I can also
use _vbscript_, if that makes any difference. I'm just not all
> >
> that knowledgeable about either J or _vbscript_s.
> > >
> > >
> > >
> > > --- In
amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" <zoopfree@> wrote:
>
> >>
> > >> Hello, hoping someone can help out here.
During a Walk-Forward test, I
> > >> am trying to pass From
and To dates from the WF engine into an
> > > embedded
>
> >> JScript. I essentially want to do a "sub-optimization" as part
of the
> > >> backtest portion of the WF test. However, it
seems that I cannot pass
> > >> variables from the AFL to the
JScript.
> > >>
> > >> Is there any way to
pass the From and To dates into the JScript? Below
> > >> is
what I have. It generates an 'undefined source' error for these
> >
>> lines:
> > >>
> > >>
> >
>> AA.RangeFromDate = FromDateStr;
> > >>
AA.RangeToDate = ToDateStr;
> > >>
> >
>>
> > >> Here is the AFL with embedded
JScript:
> > >>
> > >> FromDateNum = Status(
"rangefromdate" );
> > >> ToDateNum = Status( "rangetodate"
);
> > >>
> > >> FromDate = DateTimeConvert(
2, FromDateNum );
> > >> ToDate = DateTimeConvert( 2,
ToDateNum );
> > >>
> > >> FromDateStr =
DateTimeToStr( FromDate );
> > >> ToDateStr = DateTimeToStr(
ToDate );
> > >>
> > >>
> > >>
EnableScript( "jscript" );
> > >> <%
> >
>>
> > >> Formula = "F:\\SomeFormula.afl";
> >
>> Database = "F:\\AB Databases\\MyIB";
> > >> Settings
= "F:\\Some Settings.ABS";
> > >>
> > >> AB =
new ActiveXObject( "Broker.Application" );
> > >> AA =
AB.Analysis;
> > >>
> > >> AB.LoadDatabase(
Database );
> > >> AB.ActiveDocument.Name = "EURUSD";
>
> >> AA.LoadFormula( Formula );
> > >>
AA.LoadSettings( Settings);
> > >> AA.ApplyTo = 1;
>
> >> AA.RangeMode = 3;
> > >> AA.RangeFromDate =
FromDateStr; // * ERROR *
> > >> AA.RangeToDate =
ToDateStr;
> > >> AA.Optimize( 0 );
> >
>>
> > >> AA.Export ( "F:\\TestReport1.html" );
>
> >>
> > >> %>
> > >>
> >
>
> > >
> > >
> > >
> >
> ------------------------------------
> > >
> >
> **** 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}
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> > >
> > > 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
> > >
> > >
> >
>
> >
>
__._,_.___
**** 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/
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