|
PureBytes Links
Trading Reference Links
|
Hello,
BarIndex() is a funciton that returns array
of numbers representing
ordinal number of corresponding bars.
It is essentially the same as (Cum(1) - 1)
but faster.
<A
href="">http://www.amibroker.com/guide/afl/afl_view.php?name=BARINDEX
It makes no sense to write the code as one below.
because variable 'i' ALREADY CONTAINS current bar
index.
So it should be simply (example showing how to calculate
cumulative sum of closing prices)
A1 = 0
for( bar = 0; bar < BarCount; bar++)
{
A1 = A1 + Close[ bar ];
}
Best regards,Tomasz Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
CS
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Tuesday, May 27, 2003 10:03
PM
Subject: Re: [amibroker] Boolean
question
Jason,
Not when used as:
<FONT face=Tahoma color=#0000ff
size=2>
for (i=0;i <
BarCount;i++) {
A1=C[BarIndex() - i];
}
I am greeted
with: Error 6. Array subscript has to be a number
<FONT
color=#000000>
I
will try nested FORs. Maybe.
<FONT
color=#000000>
<FONT
color=#000000>Thanks,
<FONT
color=#000000>-CS
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
<A title=jcasavant@xxxxxxxxxxxx
href="">Jayson
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Tuesday, May 27, 2003 6:36
AM
Subject: RE: [amibroker] Boolean
question
<SPAN
class=219203313-27052003>CS,
I
think Barsindex IS a number. It returns basically the same number as
cum(1) the difference being that barsindex is faster and one is zero
based..
Regards,
Jayson
<FONT face=Tahoma
size=2>-----Original Message-----From: CS
[mailto:res1wgwl@xxxxxxxxxxx]Sent: Tuesday, May 27, 2003 5:27
AMTo: <A
href="">amibroker@xxxxxxxxxxxxxxxSubject:
Re: [amibroker] Boolean question
Thanks Graham,
I'm slowly making my way through this. I don't
have to use an IF. And won't again.
Now it seems that barindex()
is not a number. As in Close[Barindex()-i]. Sure looks
like a number to me.
-CS
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
<A title=gkavanagh@xxxxxxxxxxxxx
href="">Graham
To: <A
title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Monday, May 26, 2003 3:22
PM
Subject: RE: [amibroker] Boolean
question
<SPAN
>Cs
<SPAN
>I think you need to have
something to pass out of the loop for the plot to work, or have the plot
within the loop. The code is looking for what you are wanting to do with
the variables within the loop.
<SPAN
>Remember that with script,
from which the loops originate you have to pass out the resultant arrays
or values back to the AFL for further processing. Sorry if my terminology
or logic is wrong it is just the way I can understand the process of
coding.
<SPAN
>If you place the plot within
the loop you will get a series of 20 horizontal lines for
A1
<SPAN
lang=EN-AU
>T1=<FONT
face="Courier New" color=fuchsia><SPAN lang=EN-AU
>20<FONT
face="Courier New" color=black><SPAN lang=EN-AU
>;
<SPAN
lang=EN-AU
>Z1=<FONT
face="Courier New" color=red><SPAN lang=EN-AU
>BarCount<FONT
face="Courier New" color=black><SPAN lang=EN-AU
> >
T1;
<SPAN
lang=EN-AU
>if<FONT
face="Courier New" color=black><SPAN lang=EN-AU
>(Z1)
<SPAN
lang=EN-AU
>for<FONT
face="Courier New" color=black><SPAN lang=EN-AU
> (i=<FONT
face="Courier New" color=fuchsia><SPAN lang=EN-AU
>0<FONT
face="Courier New" color=black><SPAN lang=EN-AU
>;i<T1;i++)
<SPAN
lang=EN-AU
>
{
<SPAN
lang=EN-AU
>
A1=i ;
<SPAN
lang=EN-AU
>Plot<FONT
face="Courier New" color=black><SPAN lang=EN-AU
>(A1,<FONT
face="Courier New" color=darkred><SPAN lang=EN-AU
>"test"<FONT
face="Courier New" color=black><SPAN lang=EN-AU
>,<FONT
face="Courier New" color=fuchsia><SPAN lang=EN-AU
>3<FONT
face="Courier New" color=black><SPAN lang=EN-AU
>,<FONT
face="Courier New" color=fuchsia><SPAN lang=EN-AU
>1<FONT
face="Courier New" color=black><SPAN lang=EN-AU
>);
<SPAN
lang=EN-AU
>
<SPAN
lang=EN-AU
>
}
<SPAN
>
<FONT face="Times New Roman"
color=teal size=3><SPAN
>Cheers,<FONT
color=teal size=3><SPAN
>Graham
<FONT
face="Times New Roman" color=#339966 size=2><SPAN
><A
href=""><SPAN
>http://groups.msn.com/ASXShareTrading
<FONT
face="Times New Roman" color=#339966 size=2><SPAN
><A
href=""><SPAN
>http://groups.msn.com/FMSAustralia
<FONT face=Tahoma
size=2>-----Original
Message-----From: CS
[mailto:res1wgwl@xxxxxxxxxxx] <SPAN
>Sent: Tuesday, 27 May 2003 4:29
AMTo:
amibroker@xxxxxxxxxxxxxxx<SPAN
>Subject: Re: [amibroker] Boolean
question
<FONT face="Times New Roman"
size=2>
<FONT face=Tahoma
size=2><SPAN
>Graham,
<FONT face=Tahoma
size=2>Evidently, I
can't see why what was once a Boolean is no longer a Boolean. I am trying
to find a conditional variable that IF likes.
<FONT face=Tahoma
size=2>The whole point
of this exercise is to start a loop within FOR <FONT
face=Tahoma><SPAN
>after a certain
number of bars have passed from the beginning of the
data.
<FONT face="Times New Roman"
size=2>
<FONT face="Times New Roman"
size=2>
<FONT face=Tahoma
size=2>This
works:
<FONT face=Tahoma
color=blue size=2><SPAN
>T1=20;<FONT
face=Tahoma color=blue><SPAN
><FONT
face=Tahoma><SPAN
>Z1=True;<FONT
face=Tahoma><SPAN
>if(Z1)<FONT
face=Tahoma>for
(i=0;i<T1;i++)<FONT
face=Tahoma>
{<SPAN
> A1=i
;<SPAN
>
}
<FONT face=Tahoma
color=blue size=2><SPAN
>Plot(A1,"test",3,1);
<FONT face="Times New Roman"
size=2>
<FONT face=Tahoma
size=2>Problem is, I
need Z1 to be false <SPAN
>until 20 bars have
passed, and Z1 of course, gives no choice in this
example.
<DIV class=MsoNormal
align=center><SPAN
>
<FONT face=Tahoma color=black
size=2><SPAN
>This doesn't
because of the "array error" in <FONT face=Tahoma
color=red><SPAN
>IF(Z1)<FONT
face=Tahoma color=black> ,
although there is only one possible response per bar,
and <SPAN
>Z1<FONT
face=Tahoma color=black>
sure looks Boolean to me since it is either true or
false.
<FONT face=Tahoma
color=red size=2><SPAN
>T1=20;<FONT
face=Tahoma color=red><SPAN
><FONT
face=Tahoma>Z1=BarIndex() >
T1;<SPAN
>if(Z1)<FONT
face=Tahoma>for
(i=0;i<T1;i++)<FONT
face=Tahoma>
{<SPAN
> A1=i
;<SPAN
>
}
<FONT face=Tahoma
color=red size=2><SPAN
>Plot(A1,"test",3,1);
<DIV class=MsoNormal
align=center><SPAN
>
<FONT face=Tahoma
color=red size=2><SPAN
>Z1 = (
(BarIndex() > T1) == true );<FONT
face=Tahoma color=black><SPAN
> doesn't work, and of
course <SPAN
>Z1=IIF(BarIndex() >
T1,TRUE,FALSE); <FONT face=Tahoma
color=black>doesn't
work.
<FONT face=Tahoma color=blue
size=2><SPAN
>
<FONT face=Tahoma color=blue
size=2><SPAN
>
<FONT face=Tahoma color=black
size=2><SPAN
>Possibly, I
should write the loop as a function and access the function after the
necessary number of bars have passed by:
<FONT face=Tahoma color=blue
size=2><SPAN
>
<FONT face=Tahoma color=black
size=2><SPAN
>Plot(
<SPAN
>IIF( Z1, function(loop), NULL
)<SPAN
>, "test", Color,
Line);
<FONT face=Tahoma color=blue
size=2><SPAN
>
<FONT face=Tahoma color=black
size=2><SPAN
>Any other
ideas?
<FONT face=Tahoma color=blue
size=2><SPAN
>
<FONT face=Tahoma color=black
size=2><SPAN
>Thanks,
<FONT face=Tahoma color=black
size=2><SPAN
>-CS
<FONT face=Tahoma color=blue
size=2><SPAN
>
<BLOCKQUOTE
>
<FONT face=Arial
size=2>----- Original
Message -----
<P class=MsoNormal
><FONT face=Arial
size=2><SPAN
>From:<FONT
face=Arial> <A
title=gkavanagh@xxxxxxxxxxxxx
href="">Graham
<FONT face=Arial
size=2><SPAN
>To:<FONT
face=Arial> <A
title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
<FONT face=Arial
size=2><SPAN
>Sent:<FONT
face=Arial> Monday, May 26, 2003 6:15
AM
<FONT face=Arial
size=2><SPAN
>Subject:<FONT
face=Arial> RE: [amibroker] Boolean
question
<FONT
face="Times New Roman" size=2><SPAN
>
<FONT face=Arial
size=3>Z1 will be a 0
or 1 depending if the condition is false or true
<FONT
face="Times New Roman" size=2><SPAN
>
<P
><FONT
face="Times New Roman" color=teal size=3><SPAN
>Cheers,Graham
<P
><FONT
face="Times New Roman" color=#339966 size=2><SPAN
><A
href=""><SPAN
>http://groups.msn.com/ASXShareTrading
<P
><FONT
face="Times New Roman" color=#339966 size=2><SPAN
><A
href=""><SPAN
>http://groups.msn.com/FMSAustralia
<FONT face=Tahoma
size=2>-----Original
Message-----From: CS
[mailto:res1wgwl@xxxxxxxxxxx] <SPAN
>Sent: Monday, 26 May 2003 7:41
PMTo: <A
href="">amibroker@xxxxxxxxxxxxxxx<SPAN
>Subject: [amibroker] Boolean
question
<FONT
face="Times New Roman" size=2><SPAN
>
<FONT face=Tahoma
size=2>In
AFL:
<FONT
face="Times New Roman" size=2><SPAN
>
<FONT
face=Tahoma size=2><SPAN
>T1=20;
<FONT
face=Tahoma size=2><SPAN
>Z1=BarIndex()>T1;
<FONT face=Tahoma
size=2><SPAN
>Does <FONT
face=Tahoma><SPAN
>Z1 contain a
boolean response?
<FONT
face="Times New Roman" size=2><SPAN
>
<FONT face=Tahoma
size=2><SPAN
>Anyone know how to
convert <SPAN
>Z1 to
boolean?
<FONT
face="Times New Roman" size=2><SPAN
>
<FONT face=Tahoma
size=2><SPAN
>Thanks,
<FONT face=Tahoma
size=2><SPAN
>-CS
<P class=MsoNormal
><FONT
face="Times New Roman" size=2><SPAN
>
<FONT
face="Courier New" size=2>Send BUG REPORTS
to bugs@xxxxxxxxxxxxx<SPAN
>Send
SUGGESTIONS to suggest@xxxxxxxxxxxxx<FONT
face="Courier New">-----------------------------------------<FONT
face="Courier New">Post AmiQuote-related messages ONLY to:
amiquote@xxxxxxxxxxxxxxx <FONT
face="Courier New">(Web page: <A
href="">http://groups.yahoo.com/group/amiquote/messages/)<FONT
face="Courier New">--------------------------------------------<FONT
face="Courier New">Check group FAQ at: <A
href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is
subject to the Yahoo! Terms
of Service.
<FONT
face="Times New Roman" size=2><SPAN
>
<FONT
face="Times New Roman" size=2><SPAN
><FONT
face="Courier New">Send BUG REPORTS to
bugs@xxxxxxxxxxxxx<SPAN
>Send
SUGGESTIONS to suggest@xxxxxxxxxxxxx<FONT
face="Courier New">-----------------------------------------<FONT
face="Courier New">Post AmiQuote-related messages ONLY to:
amiquote@xxxxxxxxxxxxxxx <FONT
face="Courier New">(Web page: <A
href="">http://groups.yahoo.com/group/amiquote/messages/)<FONT
face="Courier New">--------------------------------------------<FONT
face="Courier New">Check group FAQ at: <A
href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is
subject to the Yahoo! Terms
of Service.
<FONT face="Times New Roman"
size=2><SPAN
><FONT
face="Courier New">Send BUG REPORTS to bugs@xxxxxxxxxxxxx<FONT
face="Courier New"><FONT
face="Courier New">Send SUGGESTIONS to
suggest@xxxxxxxxxxxxx<FONT
face="Courier New">-----------------------------------------<FONT
face="Courier New">Post AmiQuote-related messages ONLY to:
amiquote@xxxxxxxxxxxxxxx (Web
page: <A
href="">http://groups.yahoo.com/group/amiquote/messages/)<FONT
face="Courier New">--------------------------------------------<FONT
face="Courier New">Check group FAQ at: <A
href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is subject
to the Yahoo! Terms of
Service.
Send BUG REPORTS to
bugs@xxxxxxxxxxxxxSend SUGGESTIONS to
suggest@xxxxxxxxxxxxx-----------------------------------------Post
AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx (Web page:
<A
href="">http://groups.yahoo.com/group/amiquote/messages/)--------------------------------------------Check
group FAQ at: <A
href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is subject to the <A
href="">Yahoo! Terms of Service.
Send BUG REPORTS to bugs@xxxxxxxxxxxxxSend
SUGGESTIONS to
suggest@xxxxxxxxxxxxx-----------------------------------------Post
AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx (Web page:
<A
href="">http://groups.yahoo.com/group/amiquote/messages/)--------------------------------------------Check
group FAQ at: <A
href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is subject to the <A
href="">Yahoo! Terms of Service.
Send BUG REPORTS to bugs@xxxxxxxxxxxxxSend SUGGESTIONS
to
suggest@xxxxxxxxxxxxx-----------------------------------------Post
AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx (Web page:
<A
href="">http://groups.yahoo.com/group/amiquote/messages/)--------------------------------------------Check
group FAQ at: <A
href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is subject to the <A
href="">Yahoo! Terms of Service.
Send
BUG REPORTS to bugs@xxxxxxxxxxxxxSend SUGGESTIONS to
suggest@xxxxxxxxxxxxx-----------------------------------------Post
AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx (Web page: <A
href="">http://groups.yahoo.com/group/amiquote/messages/)--------------------------------------------Check
group FAQ at: <A
href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is subject to the <A
href="">Yahoo! Terms of Service.
Yahoo! Groups Sponsor
ADVERTISEMENT
Send BUG REPORTS to bugs@xxxxxxxxxxxxx
Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
-----------------------------------------
Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
(Web page: http://groups.yahoo.com/group/amiquote/messages/)
--------------------------------------------
Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
|