Eaton John W., Bateman David, Hauberg Søren, Wehbring Rik. GNU Octave

Edition 5. — Octave Project Developers, 2019. — 1094 p.A high-level interactive language for numerical computations (Octave version 5.1.0).
Octave was originally intended to be companion software for an undergraduate-level textbook on chemical reactor design being written by James B. Rawlings of the University of Wisconsin-Madison and John G. Ekerdt of the University of Texas.
Clearly, Octave is now much more than just another ‘courseware’ package with limited utility beyond the classroom. Although our initial goals were somewhat vague, we knew that we wanted to create something that would enable students to solve realistic problems, and that they could use for many things other than chemical reactor design problems. We find that most students pick up the basics of Octave quickly, and are using it confidently in just a few hours.
Although it was originally intended to be used to teach reactor design, it has been used in several other undergraduate and graduate courses in the Chemical Engineering Department at the University of Texas, and the math department at the University of Texas has been using it for teaching differential equations and linear algebra as well. More recently, Octave has been used as the primary computational tool for teaching Stanford’s online Machine Learning class (ml-class . org) taught by Andrew Ng. Tens of thousands of students participated in the course.