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Herman,
No, there is NO problem in using
SelectedValue(BarIndex()) and LastValue(BarIndex())
It is not necessary to spend even 2 minutes on this. Just read what I wrote
carefully.
Did you read my NEXT reply ?
<A
href="">http://finance.groups.yahoo.com/group/amibroker/message/67538
Actual array item
corresponding to bar index <FONT face=Arial
size=2>can be found this way:
bi = BarIndex();
item = SelectedValue( bi ) - bi[ 0 ]; // this
line is the key
Title = NumToStr(MyCustomArray[ item
] ,1.2);
Also if you do not want to adjust ANYTHING, you can
just add at the top
SetBarsRequired( 1000000, 1000000 );
which effectively turns off quickafl for this
SINGLE particular formula (not globally).
I don't know what is so hard to
understand:
if you want to turn off QuickAFL just add
SetBarsRequired( 1000000, 1000000 ); at the top
and you are fine, without need to touch
preferences.
If don't understand send me your code and I will
show you how to adjust it in 30 seconds or less.
Best regards,Tomasz
Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Herman van den
Bergen
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Friday, July 23, 2004 2:19 AM
Subject: RE: [amibroker] Need help with
SetBarsRequired...
<FONT face=Arial color=#0000ff
size=2>Thank you Tomasz, a good explanation... however, my question wasn't
answered. In an attempt to get my code working with QuickAFL-On I spend
several hours trimming several hundred complex (for me) lines of code in
such a way that the error msg kept occurring, i.e. try to pinpoint the
error causing statements. I narrowed it down to the use of
<FONT face=Arial color=#0000ff
size=2><FONT face=Arial color=#0000ff
size=2>SelectedValue(Barindex()) and LastValue(Barindex()). In code
using QuickAFL ON and use SetBarsRequired() these statements
generate an error message. Does this mean we cannot use these statements
in QuickAFL?
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>best regards,
<FONT face=Arial color=#0000ff
size=2>herman.
<FONT face=Tahoma
size=2>-----Original Message-----From: Tomasz Janeczko
[mailto:amibroker@xxxxxx]Sent: Thursday, July 22, 2004 7:45
PMTo: amibroker@xxxxxxxxxxxxxxxSubject: Re:
[amibroker] Need help with SetBarsRequired...Importance:
High
Herman,
Short story:
Your code does NOT really need index
addressing, setbarsrequired, barindex at all.
Somehow you managed to
complicate thing when it is very, very simple and can be coded in
2 lines:
MyCustomArray = EMA(C,3); Title
= "NumberFromMyCustomIndicator ="+NumToStr(MyCustomArray ,1.2);
<FONT face=Arial
size=2>
Long
story:
Take a look at picture below:
<TABLE cellSpacing=0
cellPadding=0 width=529 border=0 x:str>
<COL
width=97>
<COL
width=32>
<COL
width=28>
<COL
width=31>
<COL
width=28>
<COL
width=30>
<COL
width=32>
<COL
width=29>
<COL
width=37>
<COL
width=36>
<COL
width=35>
<COL
width=40>
<COL
width=32>
<COL
width=42>
<TD class=xl24
width=97 height=17>Bar Index
<TD class=xl24
align=right width=32 x:num>0
<TD class=xl24
align=right width=28 x:num>1
<TD class=xl24
align=right width=31 x:num>2
<TD class=xl24
align=right width=28 x:num>3
<TD class=xl24
align=right width=30 x:num>4
<TD class=xl24
align=right width=32 x:num>5
<TD class=xl24
align=right width=29 x:num>6
<TD class=xl24
align=right width=37 x:num>7
<TD class=xl26
align=right width=36 x:num>8
<TD class=xl24
align=right width=35 x:num>9
<TD class=xl24
align=right width=40 x:num>10
<TD class=xl24
align=right width=32 x:num>11
<TD class=xl24
align=right width=42 x:num><FONT face="Arial CE"
size=2>12
<TD class=xl25
height=17>Array element
<TD
><FONT
face="Arial CE" size=2>
<TD
><FONT
face="Arial CE" size=2>
<TD
><FONT
face="Arial CE" size=2>
<TD
><FONT
face="Arial CE" size=2>
<TD class=xl25
align=right x:num>0
<TD class=xl25
align=right x:num>1
<TD class=xl25
align=right x:num>2
<TD class=xl25
align=right x:num>3
<TD class=xl26
align=right x:num>4
<TD class=xl25
align=right x:num>5
<TD
>
<TD
>
<TD
>
You see: Bar index represents ENTIRE data set
you have.
Array may be actually smaller than your entire
data set (if visible area for indicator is small) and
may have LESS elements than entire data set you
have.
Array in indicator builder when QuickAFL is on
may include only visible part (plus some extra bars).
Now selected bar is shown with red color. As
you can see although it has a bar index of 8,
the actual array element has the number of
4.
That's why you can not use barindex to address
your arrays directly.
Instead use SelectedValue directly on array, by
simply typing:
MyCustomArray =
EMA(C,3); NumberFromMyCustomIndicator = SelectedValue(
MyCustomArray );
It is way simpler than your code
and works always and you do not need to bother about quickafl and
setbarsrequired at all.
In fact NumToStr already performs "selected
value" so you code can be simplified to 2 lines:
MyCustomArray = EMA(C,3); Title
= "NumberFromMyCustomIndicator ="+NumToStr(MyCustomArray
,1.2);
<FONT face=Arial
size=2>
It performs as you wanted it to perfom and
takes 2 lines instead of 5.
It is all actually simpler than you think.
Best regards,Tomasz
Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Herman van den
Bergen
To: <A
title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Friday, July 23, 2004 12:45
AM
Subject: RE: [amibroker] Need help
with SetBarsRequired...
<FONT face=Arial color=#0000ff
size=2>The number in the title, did it stay or was it 'replaced' by a
permanent error msg?
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>The subscript should not be out of range...any idea what is wrong
with my code?
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>I think the error occurs in the first two passes but not in the
last. If nobody can correct me I'll send it to support. I think this
problem was reported on the list more than a year ago but i can't
remember/find whether there was a solution.
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>thanks!
<FONT face=Arial color=#0000ff
size=2>herman
<FONT face=Tahoma
size=2>-----Original Message-----From: Ara Kaloustian
[mailto:ara1@xxxxxxxxxx]Sent: Thursday, July 22, 2004 5:48
PMTo: amibroker@xxxxxxxxxxxxxxxSubject: Re:
[amibroker] Need help with SetBarsRequired...Importance:
High
Herman,
I got an answer (in title line) of 19.19
and then an error message saying subscript out of range
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Herman van den
Bergen
To: <A
title=amibroker@xxxxxxxxxxxxxxx
href="">AmiBroker YahooGroups
Sent: Thursday, July 22, 2004
12:23 PM
Subject: [amibroker] Need help
with SetBarsRequired...
Sorry to
raise this topic once more...but could some kind soul please turn ON
QuickAFL and run the example code below in an Indicator by
pressing APPLY? <SPAN
class=500051718-22072004>In the AB Status bar it says it retrieved
89815 bars (RT data), <SPAN
class=500051718-22072004>Using
DebugView, w<SPAN
class=500051718-22072004>ith QuickAFL
Enabled, pressing Apply gives me these
numbers:
<SPAN
class=500051718-22072004>
<SPAN
class=500051718-22072004>[1704] #
BarNum=75,988 BarCount=75989[1704] # BarNum=75,918
BarCount=75989[1704] # BarNum=75,918
BarCount=483<SPAN
class=500051718-22072004>
It appears that the BarCount
returned by <FONT face="Times New Roman"
size=3>SelectedValue(BarIndex()) during the first the two
passes defaults to normal count even though QuickAFL is
enabled, this<SPAN
class=500051718-22072004> triggers an error msg. C<SPAN
class=500051718-22072004>an somebody please explain how i can run
this code with QuickAFL() On and
SetBarsRequired()? I know
that i can program around the problem but that doesn't help me in
my real application.
<SPAN
class=500051718-22072004><FONT
size=2><SPAN
class=500051718-22072004>
<FONT face=Arial
size=2>Your help will be much
appreciated!
<FONT face=Arial
size=2>herman.
<SPAN
class=500051718-22072004>
SetBarsRequired(
100,10);
MyCustomArray =
EMA(C,3); BarNum = SelectedValue(BarIndex()); // i want to
read the value at the cursorNumberFromMyCustomIndicator =
MyCustomArray [Barnum]; Title = "NumberFromMyCustomIndicator
="+NumToStr(NumberFromMyCustomIndicator ,1.2);
//_TRACE("#
BarNum="+NumToStr(BarNum,1.0)+"
BarCount="+NumToStr(BarCount,1.0,False));
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href="">http://www.amibroker.com/Check
group FAQ at: <A
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at:<A
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