[Octave-bug-tracker] [bug #65803] [Octave packages] (control) function 'bode' returns wrong output for phase

[Nicholas Jankowski]

Update of bug #65803 (group octave):

                  Status:                    None => Fixed                  
             Open/Closed:                    Open => Closed                 
                 Summary: function 'bode' returns wrong type for phase =>
[Octave packages] (control) function 'bode' returns wrong output for phase

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Follow-up Comment #1:

while i can confirm that in in octave 9.1.0, which I believe ships with
control 4.0.0:


octave:4> [m,p,w] = bode (tf(1));
octave:5> whos
Variables visible from the current scope:

variables in scope: top scope

  Attr   Name        Size                     Bytes  Class
  ====   ====        ====                     =====  =====
         m        1000x1                       8000  double
         p           1x1                       8000  cell
         w           1x1000                    8000  double

Total is 2001 elements using 24000 bytes


Updating the control package to the current 4.0.1 seems to return to your
expected behavior:


>> pkg install -global control-4.0.1.tar.gz
The control package was installed into the directory
<snip>
License and copyright information can be found in "packinfo/COPYING"
For information about changes from previous versions of the control package,
run 'news control'.

>> ver control
----------------------------------------------------------------------
GNU Octave Version: 9.1.0 (hg id: d0c18b1446df)
GNU Octave License: GNU General Public License
Operating System: MINGW32_NT-6.2 Windows 6.2  x86_64
----------------------------------------------------------------------
Package Name  | Version | Installation directory
--------------+---------+-----------------------
     control  |   4.0.1 | <snip>

>> pkg load control
>> [m,p,w] = bode (tf(1));
>> whos
Variables visible from the current scope:

variables in scope: top scope

  Attr   Name        Size                     Bytes  Class
  ====   ====        ====                     =====  =====
         m        1000x1                       8000  double
         p        1000x1                       8000  double
         w           1x1000                    8000  double

Total is 3000 elements using 24000 bytes


I don't see any mention of changes to the tf or bode functions in  `news
control`, but it appears this issue was fixed.  Also, the soon to be released
Octave 9.2.0 should come bundled with v4.0.1.  

For now, installing the newer package should fix the problem for you. running
the command below should work for most people:

pkg install -forge control  

to install the newer package version locally in your user profile folder 

or 

pkg install -forge -global control  

to update the bundled version in the octave installation package, if you have
rights to make such changes on your machine. 

(it is worth noting for compatibility that the outputs do not quite match
matlab output, which produces:


  m          1x1x41              328  double              
  p          1x1x41              328  double              
  w         41x1                 328  double     


but that should probably be handled elsewhere.

marking as fixed and closing report. 


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