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It would be a help if linearray worked with
barindex input with Quick AFL on.
This works:
y0=<FONT
face=Verdana>LastValue<FONT
size=2>(Trough<FONT
face=Verdana>(<FONT color=#ff0000
size=2>L,<FONT
color=#800080 size=2>4<FONT
size=2>,2<FONT
size=2>));
y1=<FONT
face=Verdana>LastValue<FONT
size=2>(Trough<FONT
face=Verdana>(<FONT color=#ff0000
size=2>L,<FONT
color=#800080 size=2>4<FONT
size=2>,1<FONT
size=2>));
BC=<FONT
face=Verdana>BarCount<FONT
size=2>-1<FONT
size=2>;
x0=<FONT
face=Verdana>LastValue<FONT
size=2>(BC)-50<FONT
face=Verdana size=2>;
x1=<FONT color=#8b0000
size=2>LastValue<FONT
size=2>(BC)-10<FONT
face=Verdana>;
This doesn't:<FONT color=#008000
size=2>
y0=<FONT
face=Verdana color=#000000>LastValue<FONT
color=#000000>(<FONT
size=2>Trough<FONT
color=#000000>(<FONT
size=2>L<FONT
size=2>,4<FONT
face=Verdana>,<FONT
size=2>2<FONT face=Verdana
color=#000000>));
y1=<FONT
face=Verdana color=#000000>LastValue<FONT
color=#000000>(<FONT
size=2>Trough<FONT
color=#000000>(<FONT
size=2>L<FONT
size=2>,4<FONT
face=Verdana>,<FONT
size=2>1<FONT face=Verdana
color=#000000>));
BC=<FONT
face=Verdana color=#ff0000>barindex()<FONT
face=Verdana color=#ff0000>;
x0=<FONT
face=Verdana color=#000000>LastValue<FONT
color=#000000>(BC)-<FONT
size=2>50<FONT face=Verdana color=#000000
size=2>;
x1=<FONT
size=2>LastValue<FONT
face=Verdana>(BC)-<FONT
size=2>10<FONT
size=2>;<FONT
color=#008000 size=2>
<FONT
color=#000000>
<FONT
color=#000000>Although both x0 and x1 seem as correct
inputs.
<FONT
color=#000000>
<FONT
color=#000000>Also, using BarCount as:
BC=<FONT
face=Verdana>BarCount<FONT
size=2>-1<FONT
size=2>;
x0=<FONT
face=Verdana>LastValue<FONT
size=2>(BC)-50<FONT
face=Verdana size=2>;
x1=<FONT color=#8b0000
size=2>LastValue<FONT
size=2>(BC)-10<FONT
face=Verdana>;
And then when trying to find the date of x0 with BarCount,
Title<FONT
color=#0000ff>=WriteVal<FONT
size=2>(LastValue(<FONT
size=2>ValueWhen(BarIndex()==X0, <FONT
size=2>DateTime())), <FONT
size=2>formatDateTime);
Results in an error.
Since
BarCount returns a number so
different from barindex, debugging is difficult.
I have no idea where the actual bar it is pointing
at. (Bar 410?)
So, I have to remember to turn Quick AFL off when using this formula.
Thanks,Corey Saxe
----- Original Message
-----
<BLOCKQUOTE
>
<DIV
>From:
Tomasz Janeczko
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Sunday, November 23, 2003 3:57
AM
Subject: Re: [amibroker] Barcount vs
BarIndex()
Hello,
BarIndex() gives true, absolute index of the quotation. It
does not depend on visible area.
BarCount is different. As we can read in the User's Guide,
what's new in AmiBroker:
"added built-in constant 'BarCount' that
returns number of bars available in arrays (the number of elements of
array)When QuickAFL is turned on it may be less than true number of bars
because QuickAFL feature attempts to use only visible bars (and few before).
You can control how many bars the formula requires using SetBarsRequired()
function"
Best regards,Tomasz Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
CS
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Sunday, November 23, 2003 12:52
PM
Subject: [amibroker] Barcount vs
BarIndex()
Sheesh,
You'd think I'd have this figured out, as many times as
I've used BarCount but...
BarIndex() doesn't appear to have any relation to
Barcount.
I have 5988 bars loaded and view 255 at a time, so
plot(BarIndex()) shows 5986 but plot(Barcount) shows 410?
Where does the 410 come from?
Description for BarCount in the AFL Reference Manual
is:
"BarCount constant gives
the number of bars in array (such as Close, High, Low, Open, Volume, etc).
Array elements are numbered from 0 (zero) to BarCount-1.
"
Doesn't the 'array' extend from the first bar to the last
bar?
<FONT
color=#0000ff>
The description for BarIndex() is:
"returns zero-based bar number - the same
as Cum(1)-1 but it is much faster than Cum(1) when used in
Indicators"
<FONT
color=#0000ff>
Here's where I derailed:
" LineArray( x0, y0, x1, y1, extend
= 0 )
generates array equivalent to trend
line drawn from point x0, y0 to point x1, y1. x
coordinates are in bars (zero based)..."
So naturally, I tried:
y0=LastValue<FONT
size=2>(Trough<FONT
size=2>(L<FONT
size=2>,4<FONT
size=2>,2<FONT
size=2>));
y1=LastValue<FONT
size=2>(Trough<FONT
size=2>(L<FONT
size=2>,4<FONT
size=2>,1<FONT
size=2>));
x0=BarIndex<FONT
size=2>()-50<FONT
size=2>;
x1=BarIndex<FONT
size=2>()-10<FONT
size=2>;
Line = <FONT
color=#8b0000>LineArray( x0, y0, x1, y1,
0 );
LineArray didn't like that.
Could someone please expand on the differences and
similarities of BarCount and BarIndex()?
How did BarCount arrive
at 410?
Thanks,Corey Saxe
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