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Thanks, TJ. Looks like I am back at square one. I contracted to have
the DLL coded because pasting the thousands of expressions at once
into the formula slowed down AB considerably. Most of the time it
hung. So I was trying to generate the expressions dynamically.
Correct me if I am wrong, but wouldn't the #include function result in
overall execution that is slower than pasting the thousands of AFL
expressions directly into the formula?
Or will it actually be faster than a copy and paste?
In some cases I am trying to evaluate tens of thousands of full blown
AFL expressions per formula.
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> wrote:
>
> Hello,
>
> You need to understand that you are attempting to PARSE expressions.
>
> The only way to parse actual full-blown AFL expressions is to
INCLUDE them
> in the formula.
>
> If you want to "create" expressions on the fly AND execute them,
> you need to take two step approach
> a) create TEXT file with actual expressions you want to parse
> b) #include that text file
>
> #pragma nocache
> #include "the_file_with_the_expressions_to_parse"
>
> in the actual formula and run it.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "ozzyapeman" <zoopfree@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Thursday, November 27, 2008 12:38 AM
> Subject: [amibroker] Re: How to convert a string to non-string
characters?!
>
>
> > TJ,
> >
> > Thanks, quick question:
> >
> > I gave the arithmetic expression as a quick trivial example. But what
> > I really want to do is create and evaluate expressions of the type:
> >
> > Condition1 = MA(C, 12) > C5 AND MA(C,20) < Close;
> >
> > so for the above case, would you also recommend writing a
> > parser/interpreter - or did you suggest that purely for arithmetic
> > expressions like "1 + 2 + 3"?
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@> wrote:
> >>
> >> You do not want to convert from string to number.
> >> What you really want is to EVALUATE arithmetic expressions !
> >> For that you need to either write parser/interpreter or use
> > external onee
> >> Thanks to AmiBroker JScript support you can use for example JScript
> > eval function.
> >>
> >>
> >> EnableScript("JScript");
> >> <%
> >>
> >> %>
> >>
> >> function Evaluate( text )
> >> {
> >> so = GetScriptObject();
> >> return so.eval( text );
> >> }
> >>
> >> "The result is " + Evaluate("3 + 2");
> >>
> >> Best regards,
> >> Tomasz Janeczko
> >> amibroker.com
> >> ----- Original Message -----
> >> From: ozzyapeman
> >> To: amibroker@xxxxxxxxxxxxxxx
> >> Sent: Wednesday, November 26, 2008 11:46 PM
> >> Subject: [amibroker] Re: How to convert a string to non-string
> > characters?!
> >>
> >>
> >> Or to take a more trivial example, the following prints "3"
> > instead of "12":
> >>
> >> VarSetText("Condition1", "3 + 4 + 5");
> >>
> >> Total = StrToNum (VarGetText("Condition1"));
> >>
> >> printf ("Sum %g", Total);
> >>
> >> How do I convert the above string so that Total is equal to the
> > expression itself, which is equal to 12?
> >>
> >>
> >> --- In amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" <zoopfree@> wrote:
> >> >
> >> > Yes, tried that. But since the values spit out by the function
> > aren't
> >> > just pure numbers, it does not seem to work.
> >> >
> >>
> >
> >
> >
> > ------------------------------------
> >
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> >
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> >
> >
>
------------------------------------
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