Scilab

Scilab 5.5

Free
Creates numerical calculations and expressions
4.0  (18 votes)
5.5.2 (See all)
Work with mathematical equations and large data bundles by quickly performing calculations in the dedicated environment featuring automated tools for solving numbers-based tasks. Numerical calculations and expressions of any complexity are supported.

Scilab is a mathematical computing program similar to MATLAB. It includes a graphical circuit designer and simulation tool called Xcos - this is similar to Simulink in MATLAB, but with less features. Scilab is an excellent tool for anyone to solve optimization problems. You can download additional toolboxes from the developer site.

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