Ticket #1056 (closed bug: wontfix)

Opened 2 years ago

Last modified 2 years ago

Instance distance bug

Reported by: samuel_kl Owned by: samuel_kl
Milestone: 2.6 Component: canvas
Severity: major Keywords: Distance
Cc: janez Blocking:
Blocked By:

Description

Example distance widget doesn't work out correctly euclidian distance I compared on several data sets with others software such as R and it seams to be impossible to obtain the same result as Orange. Of course I compared with each time no attribute transformation and euclidian distance. I attached a little file with three examples: distances computed by Orange are: 2 / 2.24 / 2.45 and with other softwares: 10.3 / 7.74 / 11.22

Attachments

Nouveau Document texte.txt Download (60 bytes) - added by samuel_kl 2 years ago.

Change History

Changed 2 years ago by samuel_kl

comment:1 Changed 2 years ago by anze

  • Cc janez added
  • Status changed from new to closed
  • Resolution set to wontfix

This problem is similar to your:  http://orange.biolab.si/forum/viewtopic.php?f=4&t=1300&p=3546#p3546

In short: Orange computes euclidean distance on the normalized data. Normalization ensures that all attributes are treated as equally important.

Note: See TracTickets for help on using tickets.