Chapter Advanced Plotting Techniques continues with more on the plot functions introduced in Chapter 2. Various two-dimensional plot types, such as pie charts and histograms, are introduced, as is customizing plots using cell arrays and string functions. Three-dimensional plot functions as well as selected functions that create the coordinates for specified objects are demonstrated. The notion of Handle GraphicsW is covered, and selected graphics properties, such as line width and color, are introduced. Applications that involve reading data from files and then plotting use both cell arrays and string functions.
First, matrix and vector operations and matrix definitions are described. This section can be covered at any point after Chapter 5. Then, matrix solutions using the Gauss-Jordan and Gauss-Jordan elimination methods are described. Since some of these require a sorted data set, methods of sorting are described. Finally, the concepts of indexing into a vector and searching a vector are introduced. Sorting a vector of structures and indexing into a vector of structures are described, but these sections can be omitted.
A recursive binary search function is in the end and may be omitted.
Chapter Sights and Sounds briefly discusses sound files and introduces image processing. An introduction to programming graphical user interfaces is also given, including the creation of a button group. Nested functions are used in the GUI examples. A patch function example uses a structure. Chapter Advanced Mathematics covers three basic topics: curve fitting, complex numbers, and integration and differentiation in calculus. Finally, Preface some of the Symbolic Math Toolbox functions are shown, including those that solve equations.
This method returns a structure as a result. Pedagogical Features There are several pedagogical tools that are used throughout this book that are intended to make it easier to learn the material. A list of Key Terms covered in each chapter, in sequence, is on the first page. First, the book takes a conversational tone with sections called Quick Question!
These are designed to stimulate thought about the material that has just been covered. A question is posed, and then the answer is given. It will be most beneficial to the reader to try to think about the question before reading the answer! In any case, these sections should not be skipped over as the answers often contain very useful information.
Practice problems are given throughout the chapters. These are very simple problems that serve as drills of the material just covered. This facilitates understanding the built-in functions and operators in MATLAB as well as the underlying programming concepts. Additionally, to aid the reader: n n n n Identifier names variables and user-defined functions are shown in italics as are filenames and file extensions. Reserved words are shown in bold and underline.
Key important terms are shown in bold and italic.
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The end-of-chapter summary contains, where applicable, several sections: n n n Common Pitfalls: A list of common mistakes that are made, and how to avoid them. Throughout the text, these are shown in bold, underlined type. Throughout the text, these are shown in bold type. Exercises: A comprehensive set of exercises, ranging from the rote to more engaging applications. Additional Book Resources A companion web site is available with downloadable. Other book-related resources will also be posted on the web site from time to time.
Additional teaching resources are available for faculty using this book as a text for their course s. Please visit www.
Throughout the last 24 years of coordinating and teaching the basic computation courses for the College of Engineering at Boston University, I have been blessed with many fabulous students as well as graduate teaching fellows and undergraduate teaching assistants. There have been hundreds of teaching assistants over the years, too many to name individually, but I thank them all for their support. Kevin Ryan created the script to produce the cover illustrations. A number of colleagues have been very encouraging through the years.
I would especially like to thank my former and current department chairmen, Tom Bifano and Ron Roy, for their support and motivation, and Tom for his GUI example suggestions. I would like to thank all the reviewers of the proposal and drafts of this book. Their comments have been extremely helpful and I hope I have incorporated their suggestions to their satisfaction. Finally, thanks go to all members of my family, especially my parents Roy Attaway and Jane Conklin, both of whom encouraged me at an early age to read and to write.
Thanks also to my husband Ted de Winter for his encouragement and good-natured taking care of the weekend chores while I worked on this project! The photo of Ted fishing in the image-processing section was taken by Wes Karger. It is also possible to write scripts and programs in MATLAB, which are essentially groups of commands that are executed sequentially.
This chapter will focus on the basics, including many operators and built-in functions that can be used in interactive expressions. Means of storing values, including vectors and matrices, will also be introduced. It has built-in functions to perform many operations, and there are toolboxes that can be added to augment these functions e.
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There are versions available for different hardware platforms, in both professional and student editions. Programs will be introduced in Chapter 2. The following commands can serve as an introduction to MATLAB and allow you to get help: n n n n n info will display contact information for the product. Note: This can take a long time. What is described here is the default layout for these windows in Version Ra, although there are other possible configurations.
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Therefore, the main features will be briefly described here. Directly above the Command Window, there is a pull-down menu for the Current Folder. The folder that is set as the Current Folder is where files will be saved. The Command History Window shows commands that have been entered, not just in the current session in the current Command Window , but previously as well. The Workspace Window will be described in the next section. This shows the files that are stored in the Current Folder. These can be grouped by type, and sorted by name.
If a file is selected, information about that file is shown on the bottom. This default configuration can be altered by clicking on Desktop, or using the icons at the top right corner of each window. Once undocked, clicking on the curled arrow pointing to the lower right will dock the window again. The Workspace Window shows variables that have been created. One easy way to create a variable is to use an assignment statement.
The expression is evaluated and then that value is stored in the variable.sungthemotir.tk
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Note that the variable name must always be on the left, and the expression on the right. An error will occur if these are reversed. Instead, another prompt appears immediately.
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However, at this point in the Workspace Window the variables mynum and res and their values can be seen. The spaces in a statement or expression do not affect the result, but make it easier to read. A shortcut for retyping commands is to hit the up arrow ", which will go back to the previously typed command s. To change a variable, another assignment statement can be used, which assigns the value of a different expression to it.
Consider, for example, the following sequence of statements: Note In the remainder of the text, the prompt that appears after the result will not be shown. Thus, the value of ans becomes 10 but mynum is unchanged it is still 7.