If you’re looking for a free alternative to MATLAB, you can consider using GNU Octave, which is a free and open-source computing environment that is similar to MATLAB.

If you don’t have a valid license, you may need to crack MATLAB 2013 to use it. However, we strongly advise against pirating software, as it is against the terms of use and can lead to serious consequences.

Once the installation is complete, you can run MATLAB 2013 by double-clicking on the desktop icon or by searching for “MATLAB” in the Start menu.

https://www.mathworks.com/products/matlab.html