bugGNU Octave - Bugs: bug #49411, [octave forge] (fuzzy-logic) fcm...

 
 

bug #49411: [octave forge] (fuzzy-logic) fcm problem with clustering big data sets

Submitted by:  Tony Trew <tonytrew>
Submitted on:  Sat 22 Oct 2016 07:15:50 AM UTC  
 
Category: Octave Forge PackageSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Segfault, Bus Error, etc.
Status: NoneAssigned to: None
Originator Name: Tony TrewOpen/Closed: Open
Release: 4.0.2Operating System: Microsoft Windows

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Sat 22 Oct 2016 05:42:32 PM UTC, comment #1:

Apologies - the problem was a bad data point with Total Votes = 0 and therefore division by zero for feature scores

Tony Trew <tonytrew>
Sat 22 Oct 2016 07:15:50 AM UTC, original submission:

Using fcm in the fuzzy-logic-toolkit-0.4.5 runs into problems with bigger sets of data points. This is the function call:

Xpc (size 22613 X 14) is a set of election results in percentages with each point summing to 1.00

The script terminates at the first iteration with the message:

If the number of points is reduced to 2700 it completes and returns [cluster_centers, soft_partition, obj_fcn_history], as well as values for:
partition_coeff (soft_partition));
partition_entropy (soft_partition, 2));
xie_beni_index (Xpc1, cluster_centers, soft_partition));

But any more points than 2700 and the same problem occurs, even if the number of clusters is reduced to 2 and the dimension of the data points decreased.

I am running this on an HP laptop, with 8.00 Gb RAM, 64-bit operating system , x64 based processor

Tony Trew <tonytrew>

 

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  • -unavailable- added by jwe (Updated the item)
  • -unavailable- added by tonytrew (Submitted the item)
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    Follow 2 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sun 13 Aug 2017 02:03:04 PM UTCjweSummaryfcm problem with clustering big data sets=>[octave forge] (fuzzy-logic) fcm problem with clustering big data sets
    Sat 22 Oct 2016 07:15:50 AM UTCtonytrewCarbon-Copy-=>Added tonytrew

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