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

 
 

bug #18568: Percentile calculations are not scalable

Submitter:  John Darrington <jmd>
Submitted:  Wed 20 Dec 2006 09:42:59 PM UTC
   
 
Category:  None Severity:  5 - Average
Status:  Fixed Assigned to:  jmd
Open/Closed:  Closed Release:  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>
Group administrator
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>
Group administrator

 

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Depends on the following items: None found

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   bug dependencies.

 

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

    Date Changed by Updated Field Previous Value => Replaced by
    2008-09-04 jmd StatusNone Fixed
        Open/ClosedOpen Closed
    2007-07-25 blp ReleaseNone Post-0.6.0
    2006-12-20 jmd Dependencies- bugs #11975 is dependent

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