Re: specgram: squeezed time plot

[Mike Miller]

On Sat, Jan 21, 2017 at 03:29:44 -0800, dariodematties wrote:
> Hello, I need to use specgram tool from signal package.
> My installation in Ubuntu 14.04 is:
> GNU Octave Version 3.8.1
> GNU Octave License: GNU General Public License
> Operating System: Linux 4.4.0-59-generic #80~14.04.1-Ubuntu SMP Fri Jan 6
> 18:02:02 UTC 2017 x86_64
> ----------------------------------------------------------------------
> Package Name  | Version | Installation directory
> --------------+---------+-----------------------
>        audio *|   1.1.4 | /usr/share/octave/packages/audio-1.1.4
>      control *|   2.6.2 | /usr/share/octave/packages/control-2.6.2
>      general *|   1.3.4 | /usr/share/octave/packages/general-1.3.4
>           io  |   2.4.5 | /home/dario/octave/io-2.4.5
>        ltfat  |   2.1.2 | /home/dario/octave/ltfat-2.1.2
>      mapping *|   1.0.7 | /usr/share/octave/packages/mapping-1.0.7
>       signal *|   1.2.2 | /usr/share/octave/packages/signal-1.2.2
>      specfun *|   1.1.0 | /usr/share/octave/packages/specfun-1.1.0
> When I run some of the examples available in:
> https://octave.sourceforge.io/signal/function/specgram.html,
> I get a plot whose time dimension is cramped in a so tiny window in time,
> that such plot cannot be visualized.
> What could be the reason for this behavior?

This was a bug in Octave 3.8.1, which is quite an old version of Octave
by now. See https://savannah.gnu.org/bugs/?42043 for details.

Improved versions of Octave are available in Ubuntu 16.04 or in the
backport PPA: https://launchpad.net/~octave/+archive/ubuntu/stable

-- 
mike