[[Category:Software]] {{Draft}}
[https://octave.org/ GNU Octave] is a scientific programming language that has a Powerful mathematics-oriented syntax with built-in 2D/3D plotting and visualization tools.  It is free and open-source software (FOSS) and is Drop-in compatible with many [[MATLAB]] scripts.

== Running Octave code ==
Consider the following example code:
{{File
  |name=octave_2d_plot.m
  |lang="matlab"
  |contents=
x = -10:0.1:10;
y = sin (x);
plot (x, y);
title ("Simple 2-D Plot");
xlabel ("x");
ylabel ("sin (x)");

print -dpng octave_2d_plot.png
quit
}}

Here is a simple Slurm script that you can use to run <code>octave_2d_plot.m</code>:
{{File
  |name=octave_job_1.sh
  |lang="bash"
  |contents=
#!/bin/bash -l
#SBATCH --time=0-00:10
#SBATCH --ntasks=1
#SBATCH --cpus-per-task=1
#SBATCH --mem=4000M
module load octave/5.2.0 gnuplot/5.4.2

octave --no-gui octave_2d_plot.m
}}

Note that Octave relies on the Gnuplot package to generate plots.

=== Running MATLAB code ===
Octave can often be used as a drop-in replacement for running MATLAB scripts, like the <code>cosplot.m</code> example on our [[MATLAB#Running_a_MATLAB_code|MATLAB]] page:
{{File
  |name=octave_job_1.sh
  |lang="bash"
  |contents=
#!/bin/bash -l
#SBATCH --time=0-00:10
#SBATCH --ntasks=1
#SBATCH --cpus-per-task=1
#SBATCH --mem=4000M
module load octave/5.2.0 gnuplot/5.4.2

octave --no-gui --traditional --eval "cosplot"
}}

== Further reading ==
* [https://octave.org/ GNU Octave Homepage]
* [https://docs.octave.org/v5.2.0/ Documentation for GNU Octave v5.2.0] (available in StdEnv/2020)
* [https://docs.octave.org/v4.2.2/ Documentation for GNU Octave v4.2.2] (available in StdEnv/2018.3)