Re: Missing is_real_vector and is_real_matrix

[Lukas Reichlin]

On 03.05.2011, at 22:57, Thomas Reinemann wrote:

> Hello,
> 
> I installed octave yesterday and tried to use the tf function. But I
> alway receive an error message like
> 
> octave:3> sys = tf (n, d)
> error: `is_real_vector' undefined near line 38 column 15
> error: called from:
> error:   /usr/share/octave/packages/control-2.0.1/@tfpoly/tfpoly.m at
> line 35, column 7
> error:   /usr/share/octave/packages/control-2.0.1/__vec2tfpoly__.m at
> line 32, column 7
> error:   /usr/share/octave/packages/control-2.0.1/@tf/tf.m at line 123,
> column 5
> 
> 
> A search in the installation directory showed that the function is used
> in many places. But there isn't a function which provides
> is_real_vector. The same is true for is_real_matrix.
> 
> Which package contains both functions?
> 
> I use OpenSuse 11.2 and installed via the OpenSuse
> 
> download.opensuse.org/repositories/science/openSUSE_11.2/
> 
> repository.
> 
> Thanks Tom

Hi Tom

The missing functions are oct-files and part of the control package.  Try to 
build and install the control package by octave itself rather than suse.  The 
octave command to accomplish this task is

pkg install -forge control

I don't know suse specifically, but on many linux flavors you need to install 
an extra package named octave-devel (or so) from the repository before you can 
compile your own oct-files.

Regards,
Lukas