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Tomasz
A bit slow, but thanks for the latest Beta. The if and for
functions are fantastic. Opens a wide area for me without having to resort
directly to script. Saves a lot of lines and time having to assign variables,
arrays and linking these back to AFL.
<font size=3 color=teal
face="Times New Roman">Cheers,
Graham
<font size=2
color="#339966" face="Times New Roman"><font
color="#339966">http://groups.msn.com/ASXShareTrading
<font size=2
color="#339966" face="Times New Roman"><font
color="#339966">http://groups.msn.com/FMSAustralia
<span
>-----Original Message-----
From: <font
face=Tahoma>Tomasz Janeczko<font
face=Tahoma> [mailto:amibroker@xxxxxx]
Sent: Monday, 14 April 2003 3:54
PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: Re: [amibroker] AmiBroker
4.31.0 BETA Examples
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">Hello,
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">While IIF works on ARRAY,
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">if/else works on
INDIVIDUAL number/boolean (element of the array).
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">Therefore you should
write either
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">a1 = IIF( C > Ref( C,
-1 ), 1, 0 );
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">(or even: a1 = C >
Ref( C, -1 );
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">or iterate:
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">for( i = 1; i <
BarCount; i++ )
<font size=2
face="Times New Roman">{
<font size=2
face="Times New Roman"> if (
Close[ i ] > Close[ i - 1 ] )
<font size=2
face="Times New Roman">
a1[ i ] = 1;
<font size=2
face="Times New Roman"> else
<font size=2
face="Times New Roman"> a1[
i ] = 0;
<font size=2
face="Times New Roman">}
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">It is important to
understand that IIF is a FUNCTION that works on arrays,
<font size=2
face="Times New Roman">while if/else is control
flow STATEMENT.
<font size=2
face="Times New Roman">Function just evaluates
all arguments and returns value(s)
<font size=2
face="Times New Roman">Control flow statement
changes program flow.
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">This is fundamental
difference.
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">Best regards,
Tomasz Janeczko
amibroker.com
<span
>----- Original Message -----
<font
size=2 face=Arial>From: <a
href="" title="jcasavant@xxxxxxxxxxxx">Jayson
<span
>To:<font
face=Arial> <a
href="" title="amibroker@xxxxxxxxxxxxxxx">amibroker@xxxxxxxxxxxxxxx
<span
>Sent:<font
face=Arial> Monday, April 14, 2003 7:55 AM
<span
>Subject:<font
face=Arial> RE: [amibroker] AmiBroker 4.31.0
BETA Examples
<font size=2
face="Times New Roman">
<font size=2 color=blue
face=Arial>Steve,
<font size=2 color=blue
face=Arial>Your example
makes sense yet does not seem to work for me. Else seems to be ignored . Using
the IIF this would simply be ......
<font size=2 color=blue
face=Arial>a1=iif(c>ref(c,-1),1,0);
I am certainly missing something here.... your input appreciated..
<font size=2 color=blue
face=Arial>jayson
<font size=2
face="Times New Roman">
<font size=2 color=blue
face=Arial><img
border=0 width=752 height=638 src="gif00210.gif"
align=baseline>
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">
<font size=2 color=blue
face=Arial>Jayson
-----Original Message-----
From: Steve Dugas
[mailto:sjdugas@xxxxxxxxx]
Sent: Sunday, April 13, 2003 11:25
AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: Re: [amibroker] AmiBroker
4.31.0 BETA Examples
<font size=2
face="Times New Roman">Hi Ken,
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">I think the concept of
loops and if-then-else is the same in all languages. I imagine you
could read up on it at many websites (e.g. - MSDN scripting
site). Once you grasp the concept, it is just a matter of using AFL syntax. You
would probably use it mostly for iterating your arrays if you wanted to do
that. Here is a simple pseudo-code - try coding it in AFL:
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">For (SecondBar to
LastBar)
<font size=2
face="Times New Roman"> If (Today's Close
> Yesterday's Close)
<font size=2
face="Times New Roman">
MyArray = 1
<font size=2
face="Times New Roman"> Else
<font size=2
face="Times New Roman">
MyArray = 0
<font size=2
face="Times New Roman">Plot MyArray
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">Of course, please feel
free to ask for help!
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">Steve
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">----- Original Message
-----
<font
size=2 face=Arial>From: <a
href="" title="amibroker@xxxxxx">Tomasz Janeczko
<span
>To:<font
face=Arial> <a
href="" title="amibroker@xxxxxxxxxxxxxxx">amibroker@xxxxxxxxxxxxxxx
<span
>Sent:<font
face=Arial> Sunday, April 13, 2003 10:39 AM
<span
>Subject:<font
face=Arial> Re: [amibroker] AmiBroker 4.31.0
BETA Examples
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">Ken,
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">Very nice story :-)
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">As per your request,
attached is a Parabolic SAR formula
<font size=2
face="Times New Roman">that I have rewritten
from JScript version
<font size=2
face="Times New Roman">(<a
href="">http://www.amibroker.com/library/detail.php?id=242)
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">Best regards,
Tomasz Janeczko
amibroker.com
<font size=2
face="Times New Roman">----- Original Message
-----
<font size=2
face="Times New Roman">From: "Ken Close"
<closeks@xxxxxxxx>
<font size=2
face="Times New Roman">To: <<a
href="">amibroker@xxxxxxxxxxxxxxx>
<font size=2
face="Times New Roman">Sent: Sunday, April 13,
2003 4:05 PM
<font size=2
face="Times New Roman">Subject: RE: [amibroker]
AmiBroker 4.31.0 BETA Examples
<font size=2
face="Times New Roman">
<font size=2
face="Times New Roman">> Tomasz:
>
> As always, you have good sound advice. However......
>
> You say, "Here is a fast sports car, very versatile and
powerful. It
> has 7 forward gears, but if you are a beginner, do not worry....always
> stay in maximum of 4th gear. Plenty of nice driving is possible in 4th
> gear. Wait until you become more experienced before you try
gears 5,
> 6, and 7."
>
> I say, "Thank you for providing such a nimble sports car, but I am in
a
> race, and I do not think I can finish even 10th in this race, until I
> get out past 4th gear. If you or others would just provide some more
> examples of how to use 5th and 6th gear, then I could more confidently
> try them. Maybe even copy your use of them. Then, probably, I will have
> enough experience to try 7th gear on my own."
>
> More examples is all I am asking for....my objective is not to stay in
> 4th gear.
>
> Thanks,
>
> Ken
>
> -----Original Message-----
> From: Tomasz Janeczko [mailto:amibroker@xxxxxx]
> Sent: Sunday, April 13, 2003 9:47 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: Re: [amibroker] AmiBroker 4.31.0 BETA Examples
>
> Ken,
>
> > First, additional kudos to Tomasz for another step-jump in capability
> of
> > Amibroker.
> Thank you.
>
> > Second, a caution, in marketing terms, of having capability that is
so
> > hard to apply for "non-programmers", beginners, and
non-technical
> types
> > that the extra capability is viewed not as an advantage or benefit,
> but
> > just the opposite.
>
> The beginners don't really need to jump into deep water right from
> the start as AFL still supports "old-way" of work.
>
> When you write
>
> TypicalPrice = (H+L+C) /3;
>
> it still operates on H, L, C arrays and produces array so no
> looping is needed.
>
> New features are added as 'extra' stuff and do not
> change the way old statements work.
>
> > I apologize - but may speak for many hidden lurkers - that I have
just
> > mastered the idea that "every AFL statement only executes
once", but
> now
> > I must scramble to reorient my brain for repeated iterations thru AFL
> > statements.
>
> See above - you don't need really to write loops if you don't want them.
> All previously written code will execute the same way as before.
>
> Unless you use a while and/or for loop nothing has really changed.
>
> So, you don't really need to "re-orient your brain" :-)
>
> You can view new features as a replacement of JScript/VBScript.
> You may use these new features only when you needed to use
> scripting in previous versions.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
>
>
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>
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