Add MATLAB book, check_urls=free-programming-books.md (#5131)

free-programming-books.md

@@ -2048,6 +2048,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Experiments with MATLAB](http://www.mathworks.com/moler/exm/index.html?requestedDomain=www.mathworks.com&nocookie=true)
 * [Freshman Engineering Problem Solving with MATLAB](https://cnx.org/exports/3a643c1f-c1ba-4c2a-8065-317a1f2b1add@18.1.pdf/freshman-engineering-problem-solving-with-matlab-18.1.pdf) (PDF)
 * [Interactive Tutorials for MATLAB, Simulink, Signal Processing, Controls, and Computational Mathematics](http://www.mathworks.com/tutorials)
+* [Introduction to MATLAB for Engineering Students](https://www.mccormick.northwestern.edu/documents/students/undergraduate/introduction-to-matlab.pdf) - David Houcque (PDF) (1.2, 2005)
 * [MATLAB - A Fundamental Tool for Scientific Computing and Engineering Applications - Volume 1](http://www.intechopen.com/books/matlab-a-fundamental-tool-for-scientific-computing-and-engineering-applications-volume-1)
 * [MATLAB - A Ubiquitous Tool for the Practical Engineer](http://www.intechopen.com/books/matlab-a-ubiquitous-tool-for-the-practical-engineer)
 * [MATLAB for Engineers: Applications in Control, Electrical Engineering, IT and Robotics](http://www.intechopen.com/books/matlab-for-engineers-applications-in-control-electrical-engineering-it-and-robotics)