Instruct: Classify a given review as either positive or negative.
Query: Excellent introduction to MATLAB!!!

I was first introduced to Matlab as part of a junior level signal processing course. Without any kind of introductory manual on using Matlab, I struggled through the course believing that it was a pain to use. Recently, needing to use Matlab again, I found Knight's book in my school library. It made a huge difference. After just a few hours with the book I felt like a Matlab wiz. This book covers the basics concisely, using plenty of examples, and also shows how easy it is to use more advanced features like graphical user interfaces. It also provides instruction for dowloading a library of useful m-files and demos. It is not a comprehensive reference but I couldn't recommend it more highly to a person who needs to learn to use Matlab or feels uncomfortable using it.