bugGNU Octave - Bugs: bug #56971, "format short" no longer...

 
 

bug #56971: "format short" no longer switches to scientific notation for very large or small values

Submitter:  Rik <rik5>
Submitted:  Mon 30 Sep 2019 05:53:01 PM UTC
   
 
Category:  Interpreter Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Regression
Status:  Fixed Assigned to:  None
Originator Name:  Open/Closed:  * Closed
Release:  * dev Operating System:  * Any
Fixed Release:  None Planned Release:  None
* Mandatory Fields

Add a New Comment Rich Markup
   

Wed 02 Oct 2019 05:08:05 AM UTC, comment #1: 

Fixed in this changeset https://hg.savannah.gnu.org/hgweb/octave/rev/6e8dac65d405.

Closing report.

Rik <rik5>
Group administrator
Mon 30 Sep 2019 05:53:01 PM UTC, original submission:  

There has been a regression with "format short" and small or large numbers.  It used to be that the format would automatically switch to scientific notation when the number got pretty large or pretty small.  Now (dev branch), Octave correctly displays the number of significant digits (5 for short format), but will display as many '0's as required which is new behavior.

What should happen when we have small numbers?  Should we end up printing a lot of zeros?  That is what happens now.


x = [-pi, 0, pi];
x*1e-6
ans =

  -0.0000031416
              0
   0.0000031416


Before, we would switch over to scientific notation at a certain point.  These are the results from version 3.4.3


octave-3.4.3:5> x*1e-3
ans =

  -0.0031416
   0.0000000
   0.0031416

octave-3.4.3:6> x*1e-4
ans =

  -3.1416e-04
   0.0000e+00
   3.1416e-04


I think we should change back to changing the format as necessary to keep the numbers more readable.

Rik <rik5>
Group administrator

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:
   
   
Comment:
   

No files currently attached

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -email is unavailable- added by pantxo (Updated the item)
  • -email is unavailable- added by rik5 (Submitted the item)
  •  

    There are 0 votes so far. Votes easily highlight which items people would like to see resolved in priority, independently of the priority of the item set by tracker managers.

    Only group members can vote.

     

    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-10-02 pantxo Open/ClosedOpen Closed
    2019-10-02 rik5 StatusConfirmed Fixed

    Back to the top

    Powered by Savane 3.13-d3ae.
    Corresponding source code