bugGNU Octave - Bugs: bug #56066, [octave forge] (symbolic)...


bug #56066: [octave forge] (symbolic) integration of heaviside

Submitted by:  Z. M. <zmarantz>
Submitted on:  Wed 03 Apr 2019 05:07:12 PM UTC  
Category:  Octave Forge Package Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  Confirmed Assigned to:  None
Originator Name:  zmarantz Open/Closed:  Open
Release:  4.4.0 Operating System:  Mac OS

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Wed 03 Apr 2019 05:26:13 PM UTC, comment #1:

I can confirm:

that expression does seem to be technically correct for t >= -1:

But it seems to be wrong for t <= -1, where it should be zero.

There are various upstream SymPy bugs about heaviside and integrals:
Does this look like https://github.com/sympy/sympy/issues/12632?

A workaround is probably

Colin Macdonald <cbm>
Wed 03 Apr 2019 05:07:12 PM UTC, original submission:

Hi Maintainer,

I am running Octave 4.4.0 on MAC OSX.

I'm working to integrate the heaviside function (as shown in the screenshot attached), but it doesn't appear to want to work when the argument is shifted.

Then again, maybe it is doing it correctly, but I do not understand what the output means.

Any assistance would be greatly appreciated.

Thank you,

Z. M. <zmarantz>


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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-04-03 mtmiller CategoryLibraries => Octave Forge Package
        StatusNone => Confirmed
        SummarySymbolic integration of heaviside. => [octave forge] (symbolic) integration of heaviside
    2019-04-03 zmarantz Attached File- => Added Screen Shot 2019-04-03 at 12.50.18 PM.png, #46713

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