Octave and QtOctave - Open source alternative to Matlab

Octave is a (mostly Matlab (R) compatible) high-level language, primarily intended for numerical computations. It provides a convenient interface for solving linear and nonlinear problems numerically.

Octave is quite similar with the Matlab language so most of the Octave codes are portable. It also provides extensive graphics capabilities for data visualization and manipulation. QtOctave is the graphical frontend to GNU octave and provides very easy to use graphical data entry, shortcuts and displays.

To install gnuplot, octave and qtoctave under ubuntu, type the following in terminal:

sudo apt-get install gnuplot octave qtoctave

I hope you enjoy your time with this open source alternative of matlab. Also, scilab is another software for the same purpose i.e. numerical computations.

I hope it helped you. :-)