|
PureBytes Links
Trading Reference Links
|
Yuki,
You either did not read what I wrote before or you just don't want to understand that
your MS database is in 32 bit floating point format and it means that
only 7 (SEVEN) digits are accurate NO MATTER what.
http://research.microsoft.com/~hollasch/cgindex/coding/ieeefloat.html
This is the limitation of IEEE 32 bit format.
If you are getting the data from MS database YOU CAN NOT IMPROVE accuracy
above 7 digits.
Now 32 bit INTEGER (used by AB) provides MORE ACCURACY, as the maximum
positive number that can be accurately represented is 2147483648
(THATS 9+ DIGITS). And that is 2 DIGITS ABOVE accuracy of your MS source.
Now if you divide everything by 10 (and you loose the least significant integer digit)
you still have 8 digits which still provides MORE accuracy than your SOURCE MS database has.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Yuki Taga" <yukitaga@xxxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Sunday, April 18, 2004 12:55 AM
Subject: [amibroker] I give up
> It looks like I simply have to give up charting volume for the TOPIX
> index. Very sad, that, but AB does not give me reasonable tools to
> be able to do it while maintaining volume "integrity" of other
> stocks.
>
> Tomasz, the MS plug-in solution will not work for me. Why? Because
> it introduces too much error in lower volume stocks. I use volume
> levels in the mechanical system that I trade. Unless volume is
> *accurate*, I do not know where I am. So I am not going to divide
> all the volumes in my database by 10, or by any other number. If you
> can come up with a solution I can apply to one issue, the TOPIX, or
> to any other individual issue that might someday become included in
> this problem (N225 volume could get there eventually), I'd be very
> happy. Until that happens however, I have to say AB no longer works
> as well for me as it used to.
>
> I'm sure you are going to rant at me for blaming AB and for not fully
> understanding this floating point issue, and that is fine. But there
> *is* a problem, and there is no acceptable work around that I can
> see. Dividing *all* my volumes is simply not the answer, and I am
> not going to do it.
>
> Yuki
>
>
>
>
> 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
> Yahoo! Groups Links
>
>
>
>
>
>
------------------------ Yahoo! Groups Sponsor ---------------------~-->
Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark
Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada.
http://www.c1tracking.com/l.asp?cid=5511
http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/GHeqlB/TM
---------------------------------------------------------------------~->
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
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|