bugGNU Octave - Bugs: bug #41504, New function: sprintfc

 
 

bug #41504: New function: sprintfc

Submitted by:  None
Submitted on:  Fri 07 Feb 2014 04:46:01 PM UTC  
 
Category: Octave FunctionSeverity: 1 - Wish
Priority: 5 - NormalItem Group: Feature Request
Status: PostponedAssigned to: None
Originator Name: Originator Email: -unavailable-
Open/Closed: OpenRelease: dev
Operating System: Any

Add a New Comment(Rich Markup)
   

You are not logged in

Please log in, so followups can be emailed to you.

 

(Jump to the original submission Jump to the original submission)

Thu 20 Mar 2014 09:27:24 AM UTC, comment #6:

I have submitted a new changeset, that addresses the problem you have pointed out, substituting the loopy structure with a reshape. As suggested by nfk, I have also changed the tests, that now use assert ().

(file #30954)

Massimiliano Fasi <mfasi>
Wed 19 Mar 2014 09:07:10 PM UTC, comment #5:

This implementation with for loops is bound to be very slow. If implemented in m-code, this should at least be done with cellfun, I believe. Did you time a cellfun version? Did you also attempt to write a version in C++?

I suppose having a slow implementation may be better than having no implementation at all. Or it might not be.

Jordi GutiƩrrez Hermoso <jordigh>
Project Administrator
Wed 05 Mar 2014 06:07:35 PM UTC, comment #4:

Submitted a patch that should fix the bug.

(file #30782)

Massimiliano Fasi <mfasi>
Sun 09 Feb 2014 02:23:54 AM UTC, comment #3:

A good compromise, if anyone cared to offer it up, would be to implement it in m-code, not C.

Michael C. Grant <mcgrant>
Sat 08 Feb 2014 04:19:20 AM UTC, comment #2:

It doesn't seem wise to try and match an undocumented internal function that Matlab could choose to change or remove at any time. Yes, I know that they haven't changed it for 9 years according to this blog (http://undocumentedmatlab.com/blog/sprintfc-undocumented-helper-function/), but that is still no guarantee.

Rik <rik5>
Project Administrator
Fri 07 Feb 2014 05:13:55 PM UTC, comment #1:

How can we implement it if there's no description of what it does?

Jordi GutiƩrrez Hermoso <jordigh>
Project Administrator
Fri 07 Feb 2014 04:46:01 PM UTC, original submission:

sprintfc is an undocumented Matlab function

>> sprintfc('%d', 1:3)


ans =

'1' '2' '3'

Anonymous

 

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

Attach File(s):
   
   
Comment:
   

Attached Files
file #30954:  sprintfc-2.patch added by mfasi (3KiB - text/x-diff)
file #30782:  sprintfc.patch added by mfasi (2KiB - text/x-diff)

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -unavailable- added by mtmiller (Updated the item)
  • -unavailable- added by mfasi (Updated the item)
  • -unavailable- added by mcgrant (Posted a comment)
  • -unavailable- added by rik5 (Posted a comment)
  • -unavailable- added by jordigh (Posted a comment)
  •  

    Do you think this task is very important?
    If so, you can click here to add your encouragement to it.
    This task has 0 encouragements so far.

    Only project members can vote.

     

    Please enter the title of George Orwell's famous dystopian book (it's a date):

     

     

    Follow 5 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Wed 03 Jun 2015 01:30:10 AM UTCmtmillerSeverity3 - Normal=>1 - Wish
      StatusNone=>Postponed
      Releaseother=>dev
    Thu 20 Mar 2014 09:27:24 AM UTCmfasiAttached File-=>Added sprintfc-2.patch, #30954
    Wed 05 Mar 2014 06:07:35 PM UTCmfasiAttached File-=>Added sprintfc.patch, #30782

    Back to the top


    Powered by Savane 3.1-cleanup1