GNU Octave A high-level language designed to perform numerical calculations

The GNU Octave is a high-level language, designed to perform numerical calculations, and is a powerful competitive product for MathWorks's Matlab business software. In addition to the simple set of commands provided by Gnuplot, Octave provides a rich language for mathematical programming. We can even write our own applications using C + + or C + + languages, and then interact with Octave.

Octave was originally written in 1992 as a supporting software for chemical reactor design textbooks. The authors hope to help students solve reactor design problems without Debugging http://www.aliyun.com/zixun/aggregation/29818.html ">fortran programs." The result is a very useful language and provides an interactive environment for solving numerical problems.

Octave can operate interactively in a scripted pattern or through C and C + + language bindings. Octave itself has a very rich language, which looks very similar to C, and has a large mathematical library, including signal and image processing, audio processing, and some special functions used in the control theory.

Official website: http://www.gnu.org/software/octave/

Because Octave uses gnuplot as the backend implementation, everything you can draw with gnuplot can be drawn using Octave. Octave does have a richer language to compute, it has many obvious advantages, but there are still some gnuplot limitations.

Installation

sudo apt install octave3.0

Snapshot

Octave:1> A = 2 * 3
A = 6
octave:2> B = [1 2 3 4]
b =

1 2 3 4

octave:3> C = A * b
c =

6 12 18 24

Octave:4> exit
octave:1> [3 1 4 1 5 9] (3)
Ans = 4
octave:2> cos ([0 pi Pi/4 7]) (3)
Ans = 0.70711
octave:1> if! strcmp (program_name, "octave"),
> "It ' s an error"
> Else
> "It works!"
> End
Ans = It works!