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<SPAN
class=275224718-16042003>Thomas,
<SPAN
class=275224718-16042003>
you
are correct. The for statement is required to step through the bars. Thank you
for your help
Jayson
<FONT face=Tahoma
size=2>-----Original Message-----From: tchan95014
[mailto:tchan95014@xxxxxxxxx]Sent: Wednesday, April 16, 2003 2:28
PMTo: amibroker@xxxxxxxxxxxxxxxSubject: [amibroker] Re:
AmiBroker 4.31.0 BETA ExamplesI do not have access to
AB now, but I guess this is a way to do it.for (i = 1; i
< BarCount; i++){ if (H[i] > H[i -
1]) { y[i] =
H[i]; }
else { y[i] =
L[i]; }}here y[0] is
undefinedI guess we are so used to the AB efficient way of
array processing that we forget how to process individual elements
now.Thomas--- In
amibroker@xxxxxxxxxxxxxxx, "dingo" <dingo@xxxx> wrote:> My
bad - I didn't go back and look a Jason's original message
closely> enough.> >
d> > -----Original Message----->
From: dingo [mailto:dingo@xxxx] > Sent: Wednesday, April 16, 2003
1:42 PM> To: amibroker@xxxxxxxxxxxxxxx> Subject:
RE: [amibroker] AmiBroker 4.31.0 BETA Examples> >
> Didn't you mean it to be:>
> if (H >
Ref(H,-1))> {X =
H;}> else> {X
= L;}> > I didn't try it just noticed the
above.> > d> >
-----Original Message-----> From: bluesinvestor
[mailto:investor@xxxx] > Sent: Wednesday, April 16, 2003 1:39
PM> To: amibroker@xxxxxxxxxxxxxxx> Subject: RE:
[amibroker] AmiBroker 4.31.0 BETA Examples> >
> Hmm ... at first glance I would have thought it would be
this:> > x = IIf(H > Ref(H,-1), H,
L); > > if (H >
Ref(H,-1))> {y =
H;}> else> {y
= L;}> > Filter=C>0;>
AddColumn(H,"H");> AddColumn(L,"L");>
AddColumn(x,"X");> AddColumn(y,"Y");>
> But after running an exploration the results are not the same
... not> sure what is wrong?> >
Peter> > -----Original
Message-----> From: Jayson [mailto:jcasavant@xxxx]
> Sent: Wednesday, April 16, 2003 1:26 PM> To:
amibroker@xxxxxxxxxxxxxxx> Subject: RE: [amibroker] AmiBroker
4.31.0 BETA Examples> > Anyone,
> > Ok, a very simple
example.....> > x=IIf (H
>Ref(H,-1),H,L); this would result in a line touching
either> the h or low of each bar based on the
condition.> if (H >Ref(H,-1))> y =
H;> else> y =L;>
Plot(y,"HL",colorYellow,1);>
Plot(C,"",4,styleCandle);> > rather than
evaluating the condition on a bar by bar basis this looks to>
lastvalue(h) to determine Y for the whole chart. How would I use
the> if/else syntax to copy IFF?>
> Jayson > -----Original
Message-----> From: bluesinvestor
[mailto:investor@xxxx]> Sent: Wednesday, April 16, 2003 11:00
AM> To: amibroker@xxxxxxxxxxxxxxx> Subject: RE:
[amibroker] AmiBroker 4.31.0 BETA Examples> Actually let me
clarify something:> condition expression=
i<barcount; means do the loop
as long as> i< the current barcount (like cum(1))??
YES> this would actually be something like do the loop as long as
i<barcount> where barcount =
lastvalue(cum(1))> > Regards,>
Peter> > -----Original
Message-----> From: bluesinvestor [mailto:investor@xxxx]
> Sent: Wednesday, April 16, 2003 10:51 AM> To:
amibroker@xxxxxxxxxxxxxxx> Subject: RE: [amibroker] AmiBroker
4.31.0 BETA Examples> > Hello
Jayson,> > myema[ 0 ] = close [0];>
> Amibroker uses zero based arrays meaning that the first record
in an> array is at the 0 position. Basically this just
gives a value to the> first myema array. The zero
position is the first data record of the> close
array.> > for ( init-expression ; cond-expression
; loop-expression ) statement > init-expression=
i=1; means we start the
loop with i=1? YES> condition expression=
i<barcount; means do the loop
as long as> i< the current barcount (like cum(1))??
YES> loop expression= i++ means
i+i+i ?????????? basically this just> means i = i
+ 1> > Hope this helps,>
Peter> > -----Original
Message-----> From: Jayson [mailto:jcasavant@xxxx]
> Sent: Wednesday, April 16, 2003 10:35 AM> To:
amibroker@xxxxxxxxxxxxxxx> Subject: RE: [amibroker] AmiBroker
4.31.0 BETA Examples> > "All you really need to
know about new features in AFL > I described
in:> > <A
href="">http://groups.yahoo.com/group/amibroker/message/37591>
<<A
href="">http://groups.yahoo.com/group/amibroker/message/37591
> "> > >
Well, almost all........ > > Tomasz or any
one smarter than me,> > Examples certainly
help. But I am still a bit lost.... from the post....>
> > This example illustrates the for
statement: > > myema[ 0 ] = Close[ 0
];> for( i = 1; i < BarCount; i++ )>
{> myema[ i ] = 0.1 * Close[ i ] + 0.9 * myema[ i - 1
];> > myema[ 0 ] = close
[0];> > Do I assume this translates
to..... myema today =close today ?? >
similar to myema=c;??> > for (
init-expression ; cond-expression ; loop-expression ) statement
> init-expression=
i=1; means we start the
loop with i=1?> condition expression=
i<barcount; means do the loop
as long as> i< the current barcount (like
cum(1))??> loop expression= i++ means
i+i+i ??????????> Could someone please convert the
expression to english? > >
Tia,> > Jayson >
-----Original Message-----> From: Tomasz Janeczko
[mailto:amibroker@xxxx]> Sent: Wednesday, April 16, 2003 5:53
AM> To: amibroker@xxxxxxxxxxxxxxx> Subject: Re:
[amibroker] AmiBroker 4.31.0 BETA Examples>
Hello,> > I fully agree. for/while/if-else +
array access is covered> on 3 or 4 pages of any C/C++
book> > So this is actually less than 1% of
entire C/C++ book.> > So there is absolutely
no need to buy/read C++ book> > All you
really need to know about new features in AFL> I described
in:> > <A
href="">http://groups.yahoo.com/group/amibroker/message/37591>
> > > Best
regards,> Tomasz Janeczko>
amibroker.com> ----- Original Message ----- >
From: uenal.mutlu@xxxx > To: amibroker@xxxxxxxxxxxxxxx
> Sent: Wednesday, April 16, 2003 10:39 AM>
Subject: Re: [amibroker] AmiBroker 4.31.0 BETA Examples>
> Hi Steve,> C++ is definitely not required to
program in AFL;> it would be an overkill! C++ covers maybe 10
times > more stuff than AFL.> The new stuff in AFL
is easily learnt within 2 hours.> Simply ask the people here.
> UM> > ----- Original
Message ----- > From: Jayson > To:
amibroker@xxxxxxxxxxxxxxx > Sent: Wednesday, April 16, 2003 6:50
AM> Subject: RE: [amibroker] AmiBroker 4.31.0 BETA
Examples> > Thank you Steve, I will see if I can
locate a copy.> >
Regards,> > Jayson >
-----Original Message-----> From: Steve Dugas
[mailto:sjdugas@xxxx]> Sent: Tuesday, April 15, 2003 11:22
PM> To: amibroker@xxxxxxxxxxxxxxx> Subject: Re:
[amibroker] AmiBroker 4.31.0 BETA Examples> Hi
Jayson,> > Sorry to offer the help and then
not be around to follow through on it.> But, Monday seems to
roll around almost every week these days, and then> its off
to work again. Better for you though - TJ filled in for me :
-> )> > I'm not sure what
kind of book you would like, but since TJ seems to> follow C++
syntax, I can recommend a C++ book that I found to be very>
good (pretty big though - over 1000 pages). It is very thorough and
easy> to understand - definitely geared for beginners in my
opinion. It is> "C++ Primer Plus" by Stephen Prata. I think you
could probably just read> up on the items you are interested
in if you aren't interested in> learning the whole language. Be
careful because it seems that there are> a couple of other
C++ books that call themselves "primers", but are> definitely NOT
for beginners. Especially stay away from Stanley> Lippman's book,
at least until you have some experience (take it from>
me....please!).> >
Steve> > ----- Original Message -----
> From: Jayson > To: amibroker@xxxxxxxxxxxxxxx
> Sent: Monday, April 14, 2003 10:01 AM> Subject:
RE: [amibroker] AmiBroker 4.31.0 BETA Examples> >
Thank you Tomasz. I have obviously gone from being fairly high on
the> learning curve to Newbie in just one week end
:(> > Could you recommend a beginner level
book that may help some of us get> up to speed with this new
upgrade? I might as well be reading Japanese ,> but I don't
want to start THAT thread again :))> >
Jayson > -----Original Message-----> From: Tomasz
Janeczko [mailto:amibroker@xxxx]> Sent: Monday, April 14, 2003
3:54 AM> To: amibroker@xxxxxxxxxxxxxxx> Subject:
Re: [amibroker] AmiBroker 4.31.0 BETA Examples>
Hello,> > While IIF works on
ARRAY,> > if/else works on INDIVIDUAL
number/boolean (element of the array).> >
Therefore you should write either> > a1 =
IIF( C > Ref( C, -1 ), 1, 0 );> > (or
even: a1 = C > Ref( C, -1 );> > or
iterate:> > for( i = 1; i < BarCount; i++
)> {> if ( Close[ i ] >
Close[ i - 1 ] )> a1[ i
] = 1;>
else> a1[ i ] =
0;> }> >
> It is important to understand that IIF is a FUNCTION that works
on> arrays,> while if/else is control flow
STATEMENT.> Function just evaluates all arguments and returns
value(s)> Control flow statement changes program
flow.> > This is fundamental
difference.> > Best regards,>
Tomasz Janeczko> amibroker.com> ----- Original
Message ----- > From: Jayson > To:
amibroker@xxxxxxxxxxxxxxx > Sent: Monday, April 14, 2003 7:55
AM> Subject: RE: [amibroker] AmiBroker 4.31.0 BETA
Examples> > Steve,> Your example
makes sense yet does not seem to work for me. Else seems to>
be ignored . Using the IIF this would simply be ......>
a1=iif(c>ref(c,-1),1,0); I am certainly missing something here....
your> input appreciated..>
jayson> > >
> > Jayson > -----Original
Message-----> From: Steve Dugas
[mailto:sjdugas@xxxx]> Sent: Sunday, April 13, 2003 11:25
AM> To: amibroker@xxxxxxxxxxxxxxx> Subject: Re:
[amibroker] AmiBroker 4.31.0 BETA Examples> Hi
Ken,> > 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:>
> For (SecondBar to LastBar)> If
(Today's Close > Yesterday's Close)>
MyArray = 1>
Else> MyArray = 0> Plot
MyArray> > Of course, please feel free to
ask for help!> > Steve>
> ----- Original Message ----- > From: Tomasz
Janeczko > To: amibroker@xxxxxxxxxxxxxxx > Sent:
Sunday, April 13, 2003 10:39 AM> Subject: Re: [amibroker]
AmiBroker 4.31.0 BETA Examples> >
Ken,> > Very nice story
:-)> > As per your request, attached is a
Parabolic SAR formula > that I have rewritten from JScript
version> (<A
href="">http://www.amibroker.com/library/detail.php?id=242)>
> > Best regards,> Tomasz
Janeczko> amibroker.com> ----- Original Message
----- > From: "Ken Close" <closeks@xxxx>>
To: <amibroker@xxxxxxxxxxxxxxx>> Sent: Sunday, April 13,
2003 4:05 PM> Subject: RE: [amibroker] AmiBroker 4.31.0 BETA
Examples> > > 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@xxxx] > > 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> > > Send BUG REPORTS
to bugs@xxxx> Send SUGGESTIONS to suggest@xxxx>
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