this book seems like a reminder notes made by the authors for themselves. i don't think anyone else may understand what is written here. check attaway's matlab textbook if you really want to learn. don't get deceived, the positive reviews were paid by the authors/editorial, this is a real review from a real user (this and all the negative ones). so again, stay away from this book, the content is as dull as the cover or more, worst matlab textbook ever.