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Re: I am finding a crash with sys1=tf(1,[1 3 2])


From: Doug Stewart
Subject: Re: I am finding a crash with sys1=tf(1,[1 3 2])
Date: Tue, 22 May 2012 16:55:36 -0400



On Tue, May 22, 2012 at 4:51 PM, Lukas Reichlin <address@hidden> wrote:

On 22.05.2012, at 22:44, Doug Stewart wrote:

>
>
> On Tue, May 22, 2012 at 4:38 PM, Lukas Reichlin <address@hidden> wrote:
> On 22.05.2012, at 21:39, Doug Stewart wrote:
>
> >
> >
> > On Tue, May 22, 2012 at 3:24 PM, Lukas Reichlin <address@hidden> wrote:
> > On 22.05.2012, at 20:14, Doug Stewart wrote:
> >
> > > Could someone try this with 3.7.0+
> > > I am finding a crash with
> > > sys1=tf(1,[1 3 2])
> > >
> > > You will need the control pkg.
> > >
> > >
> > > --
> > > DAS
> >
> > octave:1> sys1=tf(1,[1 3 2])
> >
> > Transfer function 'sys1' from input 'u1' to output ...
> >
> >            1
> >  y1:  -------------
> >      s^2 + 3 s + 2
> >
> > Continuous-time model.
> > octave:2>
> >
> > I am using Octave 3.6.2-rc0. Have you tried a fresh install of the control package? Possibly the oct-files need to be rebuilt.
> >
> > Lukas
> >
> > I know that it works with 3.6.1 and now 3.6.2 what I asked for was the 3.7.0+ development branch.
> >  Does any one have a recent compile.
> >
> >
> > --
> > DAS
>
> See whether
>
>        is_real_vector (1)
>        is_real_vector ([1 3 2])
>
> works. is_real_vector is the only oct-file from control which is called by tf.
> The code is very simple:
> http://octave.svn.sourceforge.net/viewvc/octave/trunk/octave-forge/main/control/src/is_real_vector.cc?revision=7855&view=markup
>
> Have you tried a fresh install of the control package?
>
> Lukas
>
>
> I tried
>       is_real_vector (1)
> and it crashed. (the window disappeared)
>
> --
> DAS

OK, as we have now a simple test case, a core octave developer should have a look at this. I'm afraid I can't help.

Lukas


Thanks Lukas  -- I will dig deeper here.

and thanks to Dmitri.  (spelled it right this time)

--
DAS

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