Bug report #6841
Variable Jenks classification in QGIS
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Symbology | ||
| Affected QGIS version: | master | Regression?: | No |
| Operating System: | Ubuntu | Easy fix?: | No |
| Pull Request or Patch supplied: | No | Resolution: | end of life |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 15977 |
Description
When I re-classified the bins using Jenk's classification, the bin values change substantially.
Nothing else changes: I just clicked "Classify" and every time a slightly different result emerged.
This is strange behaviour (Jenk's classification is not probabilistic, but requires a certain number of iterations I belive http://en.wikipedia.org/wiki/Jenks_natural_breaks_optimization ).
To see this behaviour, please see this video:
http://www.youtube.com/watch?v=-Z1j9Zca9v0&feature=youtu.be
Is this behaviour repeated on other versions of QGIS?
Any ideas why it's happening?
Robin
History
#1
Updated by Jürgen Fischer almost 10 years ago
- Target version changed from Version 2.0.0 to Future Release - Lower Priority
#2
Updated by Christophe Damour over 8 years ago
Same problem here. Any news on this bug ?
#3
Updated by Giovanni Manghi almost 7 years ago
- Easy fix? set to No
- Regression? set to No
#4
Updated by Giovanni Manghi about 5 years ago
- Resolution set to end of life
- Status changed from Open to Closed
End of life notice: QGIS 2.18 LTR
Source:
http://blog.qgis.org/2019/03/09/end-of-life-notice-qgis-2-18-ltr/