it is a great for mac and linux user.. there is an application such as matlab.. it free … it give me a big smile..

GNU Octave is a high-level language, primarily intended for numerical computations. It is similar to the commerial product MATLAB. It gives you an command line environment where you can do calculation, solve equations, manipulate matrices and plot graphs. A list of commands can be put into a file and executed as an interpreted scripting language.

A simple example of a Octave session
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

source:ubuntu