What about Octave?
https://www.gnu.org/software/octave/
A high level of language compatibility with Matlab, and there's even a GUI for it now.
Though personally, I'd just do it in Fortran...
https://www.gnu.org/software/octave/
A high level of language compatibility with Matlab, and there's even a GUI for it now.
Though personally, I'd just do it in Fortran...