Dear all,
I wrote an updated plugin for Octave, with improved compatibility with plotting functions of Octave versions 4 and 5.
I also corrected a bug that was introduced in the TeXmacs 1.99.7 distribution (a necessary file was dropped).
I tested the plugin with TeXmacs from 1.99.7 to 1.99.11 and Octave from 4.0.3 to 5.1.0 on OSX High Sierra, Windows 10, Cygwin, Debian 8 and Ubuntu 18 (not all the combinations...).
Octave (in the OS searchable path) at least version 4 is required.
In attachment a quick example showing what can be obtained.
Please, let me know if you are interested in testing or using this plugin.
Best
Lorenzo