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Matlab or Octave online

We'll describe how to use several free interfaces that allow you to use the functions on the web, without needing to install Octave or Matlab, and that work on any computer or mobile phone with a reasonably up-to-date browser (such as Chrome, Opera, or Firefox). However, these interfaces are sometimes limited, so it's important to also read the detailed difficulties.

Octave Online

Use Octave 9.3.0. It's very simple and also allows you to obtain solutions with variable or exact precision.

Enter the interface. If a welcome window appears, click the "Start Using Octave Online" button at the bottom of the window. The website will load in a few seconds.
Type the commands (press the "Enter" key after each command) to use the functions in the bottom cursor of the white screen on the right, such as

F(:,:,1)=[-280,-12;-120,-8;-280,-12];
F(:,:,2)=[575,0;0,20;400,0];
[k,X,Y]=vn(F)

Problems with this interface:

The installed version of the functions is the new one being tested;
The execution time of each command is limited, but can be extended successively in 15-second increments via a link displayed next to the cursor;
Occasionally, it becomes overloaded because many users are using it at the same time. With Firefox, you may see a message that it is overloaded, even though it isn't; if so, use another browser.

CoCalc

Uses Octave 8.2.0 and allows you to obtain solutions with variable or exact precision, but you need to upgrade the functions.

Go to CoCalc and log in to your account (you can use the gateway to your Facebook, Google, or Twitter accounts).
Click "Your Projects" in the top bar, and in the web page that opens, click the "Create Project" button.
Unzip matlaboctave.zip (or matlaboctave2.zip, the new version being tested) on your computer, select the files inside, and drag them to the "Create or Upload Files" section at the bottom of the page; uploading the files may take a few seconds.
In the "New" drop-down menu, choose "Terminal (.term)" to create a text-based terminal and click the "Create" button. Once created, type the command to run the program (press the "Enter" key after each command).

octave

The program will start in a few seconds and you can type the commands to use the functions, such as

F(:,:,1)=[-280,-12;-120,-8;-280,-12];
F(:,:,2)=[575,0;0,20;400,0];
[k,X,Y]=vn(F)

Alternatively to step 4, you can create a graphical terminal by selecting "Linux Graphical X11 desktop (.x11)" and clicking the "Create" button. A three-part page will open, and in the lower left corner, click the "Octave" button.

rollApp

Runs with Octave 5.2.0, but you must upload the functions.

Unzip matlaboctave.zip (or matlaboctave2.zip, the new version being tested) on your computer and upload the files to your cloud storage (if you don't have one, you can get one for free on Dropbox or Google Drive).
Go to rollApp, register for free, and log in to your account (you can use the gateway to your Google or Facebook account).
Connect rollApp to your cloud storage.
Click "Launch Online." Accept the launch prompts that appear, opening the pop-up windows, and you will see the Octave interface.
Navigate to the directory containing the unzipped files in your cloud storage in the upper left window.
Type the commands to use the functions on the white screen on the right, such as

F(:,:,1)=[-280,-12;-120,-8;-280,-12];
F(:,:,2)=[575,0;0,20;400,0];
[k,X,Y]=vn(F)

Problems with this interface:

It cannot be used to obtain solutions with variable or exact precision;
If you have trouble typing certain characters using a Spanish keyboard, you can copy and paste them into Octave; you can also change the keyboard layout to English;
With a free account, you won't be able to modify functions from the Octave editor.

Other interfaces

There are other interfaces, such as Coding Ground, NCLab, Octave Online, Verbosus or Ideone, but loading functions into them is more complicated. You can also register and upload the functions to your account in Octave Online.

You can also use the functions on the web with Matlab Online or Matlab Mobile, but only if you have a license or if you use a free 30-day trial version. To do this, you must upload the functions to Matlab Drive. You can consult their help.

You can find more information about Octave on their website, including their manual in HTML and PDF.

Español – Home / Algorithms in Matlab or Octave