bugPSPP - Bugs: bug #18568, Percentile calculations are not...

 
 

bug #18568: Percentile calculations are not scalable

Submitted by:  John Darrington <jmd>
Submitted on:  Wed 20 Dec 2006 09:42:59 PM UTC  
 
Category: NoneSeverity: 5 - Average
Status: FixedAssigned to: John Darrington <jmd>
Open/Closed: ClosedRelease: Post-0.6.0
Effort: 0.00

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Thu 04 Sep 2008 12:36:19 PM UTC, comment #1:

This problem has now been (largely) fixed.

John Darrington <jmd>
Project AdministratorIn charge of this item.
Wed 20 Dec 2006 09:42:59 PM UTC, original submission:

Percentiles as calculated by EXAMINE and FREQUENCIES use the heap to store sorted data. This means that failures are likely for large data sets. eg:

DATA LIST LIST /x * w *.
BEGIN DATA.
3 1
2 5000000
4 1
END DATA.

WEIGHT BY w.

EXAMINE /x
/PERCENTILE= 10, 50, 90
.

Internally, the data needs to be streamed into a casefile instead of an array.

John Darrington <jmd>
Project AdministratorIn charge of this item.

 

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Depends on the following items: None found

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   bug dependencies.

 

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  • -unavailable- added by blp (Updated the item)
  • -unavailable- added by jmd (Submitted the item)
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    Follow 4 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Thu 04 Sep 2008 12:36:19 PM UTCjmdStatusNone=>Fixed
      Open/ClosedOpen=>Closed
    Wed 25 Jul 2007 03:19:47 PM UTCblpReleaseNone=>Post-0.6.0
    Wed 20 Dec 2006 09:43:55 PM UTCjmdDependencies-=>bugs #11975 is dependent

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