pi
format long
pi
format long e
pi
pi * 1000

Possible solution: use fdisp and then load the string from the temporary file.

Problem Description

From #4, there will be a flash of the octave gui when a session is started because the plugin now starts 'octave' rather than 'octave-cli' for the issue of plotting through qt.

Environments Reproduced

• Linux: Manjaro KDE

Further revisions and discussions need.

Plotting in a session doesn't always work.
If I put these lines in a session

octave>  x = [-pi:0.1:pi];
octave>  hold on;
octave>  plot(x,sin(x));
octave>  plot(x,cos(x))

and repeatedly execute the last two commands, after two times the plot doesn't show up anymore. It seems the method to set TM_OCTAVE_PLOT_DIGEST is not robust.
It seems like if we simply do

    if disp_ans
      tmplot (); ## call TeXmacs plotting interface
      clf()
    endif

in tmrepl.m that plots show as expected, since tmplot() already checks whether the plot is empty or not.

same as #2

Fix https://github.com/texmacs/octave/blob/master/octave/convert/str2scm.m

Using Octave from https://octave-app.org/.

Here is the pattern:

/Applications/Octave-5.2.0.app/Contents/Resources/usr/Cellar/[email protected]/5.2.0/bin/
/Applications/Octave-6.1.0.app/Contents/Resources/usr/Cellar/[email protected]/6.1.0/bin/

Problem description

In an octave sesion, when executing a (any) command, throw an error:

error: feval: /usr/lib/octave/5.2.0/oct/x86_64-pc-linux-gnu/init_fltk.oct: failed to load: libfltk_gl.so.1.3: cannot open shared object file: No such file or directory
error: called from
graphics_toolkit at line 91 column 5
figure at line 91 column 7
gcf at line 63 column 9
tmrepl at line 41 column 21
~/.TeXmacs/plugins/octave/octave/tmstart.m at line 47 column 1
warning: gh_manager::do_close_all_figures: some graphics elements failed to close.

Problem reproduction

• Without fltk or gnuplot installed on the system. By default, octave will use qt as the plot engine.
• Open TeXmaxs, open an octave session, execuate any command

Problem attribution

From /octave/progs/init-octave.scm, it seems that the command to open a new octave instance is "octave-cli". I tried to execute "available_graphics_toolkits", the result is

ans =
{
[1,1] = fltk
}.

Also, the result of command "graphics_toolkit" in octave is

ans = fltk.

After I searched for any similar issue, I found this. Perhaps it's because octave-cli does not recognize "qt" as a plot toolkit.

Possible solution

• Use "octave --no-gui" as the command to create a new octave instance.
• Install fltk or gnuplot package

On OSX 10.13.6 and OSX 10.15.7 plotting sessions with MacPorts octave_6.2.0_0 using the 1.99.19 octave-plugins (i.e. the one that comes with TeXmacs 1.99.19 as well as the latest upgrade as of 2021.03.13 from GitHub) seem to be somewhat flawed.

• Multi-line sessions do not produce in-line graphics.

• Plotting output, however, can be written to disk.

I do understand that the maintainers recommend usingoctave_5.x. Interestingly enough though, the older 1.99.18 octave-plugin in this respect works better, both, with TeXmacs 1.99.19 and octave_6.1.0_0/octave_6.2.0_0: Multi-line octave session run and produce in-line graphics.

Will this issue be addressed one of these days?

Cheers Tilda

a = 1; a

The result of a should be printed.

The cursor is misleading.

I am getting a busy message when I insert an octave session

I am running octave 6.2.0 on windows 10