Re: octave plots/graphics
On Tue, Apr 16, 2019 at 10:21:35AM -0300, Bruno Schneider wrote:
> I have just installed octave and it seems I'm missing some parts. I'm
> using Debian testing with XFCE. I have the following packages
> installed:
>
> $ dpkg -l | grep octave
> ii liboctave6:amd64 4.4.1-5
> ii octave 4.4.1-5
> ii octave-bsltl 1.1.1-2
> ii octave-common 4.4.1-5
> ii octave-doc 4.4.1-5
> ii octave-image 2.10.0-2
>
> On octave, i enter the following commands:
>
> x = linspace(0, 2*pi);
> a = cos(2*x);
> plot(x, a);
>
> Then, a window appears with menus, but the drawing is completely blank.
>
> I get some font errors. I don't know if they affect the graph:
>
> warning: ft_manager: unable to load font:
> /usr/share/fonts/opentype/freefont/FreeSans.otf
> warning: called from
> axes at line 66 column 10
> newplot at line 158 column 10
> plot at line 222 column 9
> warning: ft_text_renderer: unable to load appropriate font
>
> It seems I'm using Qt for graphics but my system seems to have all
> libqt5* packages installed. I also tried gnuplot graphics and the
> window was also blank.
>
> Am I missing packages?
>
Why do you ignore the *very clear* error message?
try
apt install fonts-freefont-otf
And then check if the plot works.
> Can I configure octave to use other fonts instead?
> --
> Bruno Schneider
>
--
Henning Follmann | hfollmann@itcfollmann.com
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