bugGNU Octave - Bugs: bug #46831, Symbolic Package: Differentiation...

 
 

bug #46831: Symbolic Package: Differentiation of an integral fails

Submitted by:  None
Submitted on:  Wed 06 Jan 2016 07:36:10 PM UTC  
 
Category: Octave Forge PackageSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Segfault, Bus Error, etc.
Status: FixedAssigned to: None
Originator Name: Jari-Pekka IkonenOriginator Email: -unavailable-
Open/Closed: ClosedRelease: 4.0.0
Operating System: Microsoft Windows

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Thu 07 Jan 2016 07:29:33 PM UTC, comment #4:

At your service, Colin :-)

Philip Nienhuis <philipnienhuis>
Project Member
Thu 07 Jan 2016 08:41:53 AM UTC, comment #3:

maintainers: please close: fixed

This is fixed in https://github.com/cbm755/octsympy/commit/51a80384d5caea0db211e452d39f0b4f6b3778cc

Colin Macdonald <cbm>
Wed 06 Jan 2016 10:39:38 PM UTC, comment #2:

Ok, problem is that F is a "NonElementaryIntegral" and this object is not exposed by "from sympy import *". In my python example below, "eval(srepr(F))" will fail: that this works is necessary to be able to copy objects from Octave back to Python.

I can probably workaround this in "python_header.py"... stay tuned.

Colin Macdonald <cbm>
Wed 06 Jan 2016 08:16:16 PM UTC, comment #1:

Confirmed, and it works in SymPy directly so this should be fixable:

IPython:

Colin Macdonald <cbm>
Wed 06 Jan 2016 07:36:10 PM UTC, original submission:

Following error:

Otherwise integration and differentiation function as expected.

Python 3.5.1, SymPy 0.7.6.1, symbolic-2.2.4, Windows 10.
Similar expression tested in Python/SymPy returns the original integrand.

Anonymous

 

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    Follow 2 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Thu 07 Jan 2016 07:29:33 PM UTCphilipnienhuisStatusNone=>Fixed
      Open/ClosedOpen=>Closed

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