[Octave-bug-tracker] [bug #56359] Error: 'is_real_square_matrix' undefined when calling functions from control pkg (after Octave upgrade)

[Bill Tubbs]

URL:
  <https://savannah.gnu.org/bugs/?56359>

                 Summary: Error: 'is_real_square_matrix' undefined when
calling functions from control pkg (after Octave upgrade)
                 Project: GNU Octave
            Submitted by: billtubbs
            Submitted on: Mon 20 May 2019 10:15:09 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: Bill
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 5.1.0
        Operating System: Mac OS

    _______________________________________________________

Details:

I recently upgraded my octave installation from 4.something to 5.1 on Mac OS X
and now I get the following bugs when I use functions from the control
package:

```
(base) BillsMacBookPro-9:~ billtubbs$ octave
GNU Octave, version 5.1.0
Copyright (C) 2019 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  For details, type 'warranty'.

Octave was configured for "x86_64-apple-darwin18.5.0".

Additional information about Octave is available at https://www.octave.org.

Please contribute if you find this software useful.
For more information, visit https://www.octave.org/get-involved.html

Read https://www.octave.org/bugs.html to learn how to submit bug reports.
For information about changes from previous versions, type 'news'.

octave:1> A = [1 1; 0 1]
A =

   1   1
   0   1

octave:2> B = [0; 1]
B =

   0
   1

octave:3> Q = [1 0; 0 0]
Q =

   1   0
   0   0

octave:4> R = 100.0
R =  100
octave:5> pkg load control
octave:6> lqr(A, B, Q, R)
error: 'is_real_scalar' undefined near line 65 column 14
error: called from
    issample at line 65 column 12
    lqr at line 92 column 3
octave:6> ctrb(A, B)
error: 'is_real_square_matrix' undefined near line 66 column 11
error: called from
    ctrb at line 66 column 5
octave:6> 
```

Do I need to reinstall control pkg or something obvious?  Sorry, I am not an
Octave pro..




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