Discussion :

[doradoradora]

Bonjour à toutes et à tous,

Tout d'abord je travaille sour macOS Mojave version 10.14.5
je cherche à installer un package octave mais je n'y arrive pas.

Voici comment je m'y prends :

• quand j'ouvre octave, le répertoire courant est : /users/mon_nom
• je télécharge sur SourceForge.net mon package : signal-1.4.1.tar
• je le déplace depuis mon dossier de téléchargements vers le répertoire : /users/mon_nom
• je vais dans la console octave et je tape et exécute : pkg install signal-1.4.1.tar
• j'ai une erreur qui s'affiche ( en pièce jointe )

Lorsque je retourne dans mon répertoire /users/mon_nom j'observe qu'un dossier vide "octave" s'est créé. Je ne sais pas si c'est normal qu'il soit vide?
En vous remerciant par avance.

[doradoradora]

In order to run some programs with Octave, you must install some packages.
Here is how to do it.

To download a package ( no matter which one ), two steps are needed :

• installing
• loading

Before installing you have to download the package needed on the following ( official Octave ) website :

https://octave.sourceforge.io

The downloaded package has the following extension :

.tar

Then you have to put this folder in the same folder as where the Octave workspace is set. The default installation put it in the following folder :

/disk/Users/Your_Name

Now you can run Octave and go into the shell which is a text window starting with the following first new sentences :

GNU Octave, version 4.0.3
Copyright (C) 2016 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. For details, type 'warranty'.

Octave was configured for "x86_64-apple-darwin14.5.0".

Additional information about Octave is available at http://www.octave.org.

Please contribute if you find this software useful.
For more information, visit http://www.octave.org/get-involved.html

Read http://www.octave.org/bugs.html to learn how to submit bug reports.
For information about changes from previous versions, type 'news'.

>>


And you can enter install your package by typing :

>> pkg install package_name.tar

Then the shell will take time and can show plenty of line codes or not ( in the Octave help section it is said that nothing should appear ). If it shows warnings do not pay attention.
In order ( or not ) to verify if the package is installed or not you can load it by typing in the shell :

>> pkg load package_name

If the package is not installed, the shell will answer :

error: package package_name is not installed
error: called from
load_packages at line 53 column 11
pkg at line 422 column 7

On the contrary, if the package is installed, the shell should not answer anything.
If you want to verify it a very last time you can ask for help about the Octave build-in function you were looking for.


Let’s take an example, if you wanted to use the function «*findpeaks*» from the «*signal*» package, once you have downloaded and loaded it, you can type in the shell the following command :

>> help findpeaks

If the package is installed you will have the following answer :.

'findpeaks' is a function from the file …

If not, the answer would be :

error: help: the ‘findpeaks’ function belongs to the signal package from Octave Forge
which seems to not be installed in your system.

Please read <http://www.octave.org/missing.html> to learn how you can
contribute missing functionality.

Eventually, to download some packages you have to download others before. Sometimes the Octave Shell tells you what package you have to install firstly. If not, google it.