Update MATLAB/Octave documentation

doc/doc/install/04-start-matlab-project.rst

@@ -10,7 +10,7 @@ Start a MATLAB project
 
 .. warning::
 
-  | MATLAB support is preliminary, limited tests have been made for now. See `this example <https://github.com/codac-team/codac/blob/master/examples/tuto/01_getting_started/a01_getting_started.m>`_.
+  | MATLAB/Octave support is preliminary, limited tests have been made for now. See `this example <https://github.com/codac-team/codac/blob/master/examples/tuto/01_getting_started/a01_getting_started.m>`_.
 
 | Codac is ready to be used if you have at least MATLAB R2019b, `a supported version of Python <https://fr.mathworks.com/help/matlab/matlab_external/install-supported-python-implementation.html>`_ and :ref:`installed Codac Python package <sec-installation-py>`.
 
@@ -50,7 +50,26 @@ If everything is well installed on your computer, you should see the following w
 
 .. warning::
 
-  Octave support is more limited than MATLAB at the moment (and only briefly tested on Ubuntu 22.04 for now). `Pythonic <https://gitlab.com/gnu-octave/octave-pythonic>`_ needs to be installed to be able to call Python code from Octave. It has currently some limitations (see https://wiki.octave.org/Pythonic) such as: 
+  Octave support has been only briefly tested on Ubuntu 22.04 for now. `Pythonic <https://gitlab.com/gnu-octave/octave-pythonic>`_ can be used to be able to call Python code from Octave. Some known necessary adaptations (see also https://wiki.octave.org/Pythonic) are: 
 
-  * Missing `import` command. https://gist.github.com/lebarsfa/ebc19b143df77753842f920b4b680b84#file-import-m can be loaded in Octave as a workaround.
-  * Operators such as `+`, `-`, `*`, `/`, `==`, `!=`, etc. do not seem overloaded (see https://gitlab.com/gnu-octave/octave-pythonic/-/issues/129, note that these operators are supported by MATLAB, but some others might not be supported by MATLAB either, see the bottom of https://fr.mathworks.com/help/matlab/matlab_external/differences-between-matlab-python.html). The internal methods `__add__()`, `__sub__()`, `__neg__()`, `__mul__()`, `__truediv__()`, `__eq__()`, `__ne__()`, etc. can be used instead.
+  * Missing `import` command. https://gist.github.com/lebarsfa/ebc19b143df77753842f920b4b680b84#file-import-m can be loaded in Octave as a workaround. To always load it, try to add its content to `~/.octaverc` (e.g. with `cat import.m>>~/.octaverc`).
+  * In at least Octave v6.4.0 and below, operators such as `+`, `-`, `*`, `/`, `==`, `!=`, etc. are not overloaded (note that these operators are supported by MATLAB, but some others might not be supported by MATLAB either, see the bottom of https://fr.mathworks.com/help/matlab/matlab_external/differences-between-matlab-python.html). The internal methods `__add__()`, `__sub__()`, `__neg__()`, `__mul__()`, `__truediv__()`, `__eq__()`, `__ne__()`, etc. can be used instead. A modified version of Pythonic is currently being developed to support these operators (see https://gitlab.com/gnu-octave/octave-pythonic/-/issues/129) and can be installed as follows:
+
+    .. code-block:: bash
+
+      sudo apt install octave liboctave-dev libpython3-dev build-essential make git
+      git clone https://gitlab.com/gnu-octave/octave-pythonic.git
+      cd octave-pythonic
+      git fetch https://gitlab.com/Vipul-Cariappa/octave-pythonic.git operators
+      git checkout -b octave-pythonic-operators FETCH_HEAD
+      make
+      make check
+      octave --path $PWD/inst --path $PWD/src
+
+    Then in Octave: 
+
+    .. code-block:: octave
+
+      pkg install .
+
+  Then, Codac should be ready to be used in Octave as in MATLAB.