bugGNU Octave - Bugs: bug #63378, [octave forge] (symbolic) Bugs in...

 
 

bug #63378: [octave forge] (symbolic) Bugs in fourier and ifourier functions

Submitter:  None
Submitted:  Thu 17 Nov 2022 02:36:24 PM UTC
 
Category:  Octave Forge Package Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Incorrect Result
Status:  None Assigned to:  None
Originator Name:  Yinchao Chen Originator Email:  -email is unavailable-
Open/Closed:  * Open Release:  * 7.2.0
Operating System:  * Microsoft Windows Fixed Release:  None
Planned Release:  None
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Sat 19 Nov 2022 01:19:47 PM UTC, comment #2: 

IIUC, you are reporting an issue with a function from the Symbolic package.

You might get better feedback from their developers by opening an issue on their GitHub repository:
https://github.com/cbm755/octsympy/issues

Markus M├╝tzel <mmuetzel>
Project Member
Thu 17 Nov 2022 07:01:15 PM UTC, comment #1: 

What are w, w0 and t in your example? Could you give a minimum reproducible example pls? (Start with "pkg load").

Arun Giridhar <arungiridhar>
Project Member
Thu 17 Nov 2022 02:36:24 PM UTC, original submission:  

Thanks for your great product, and I am enjoying to use it to teach my class Signal and Systems.

The following two bugs were found:

1) The original codes:

f=sin(w0*t);
Fw=fourier(f)

The result was

Fw = (sym) 0 (Not right)

2) The original codes:

F(w)=pi*dirac(w)+1/(i*w);
ft(t)=ifourier(F,t)
t0=5;
eval(ft(t))

The result was
ans =   4.0000e+00 - 6.1099e-151i (expecting "1" here)

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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2022-11-19 mmuetzel CategoryOther Octave Forge Package
        Item GroupNone Incorrect Result
        SummaryBugs in fourier and ifourier functions [octave forge] (symbolic) Bugs in fourier and ifourier functions

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