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By Brian R. Hunt, Ronald L. Lipsman, Jonathan M. Rosenberg, with Kevin R. Coombes, John E. Osborn, and Garrett J. Stuck

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Finally, we observe that the Workspace browser presents a graphical alternative to whos. You can activate it by clicking on the Workspace tab, by typing workspace at the command prompt, or through the View item on the menu bar. Figure 2-2 depicts a Desktop in which the Command Window and the Workspace browser contain the same information as displayed above. Errors in Input If you make an error in an input line, MATLAB will beep and print an error message. For example, here’s what happens when you try to evaluate 3uˆ2: >> 3uˆ2 ???

A much better approach is to create an M-file. There are two different kinds of M-files: script M-files and function M-files. We shall illustrate the use of both types of M-files as we present different solutions to the problem described above. M-files are ordinary text files containing MATLAB commands. You can create and modify them using any text editor or word processor that is capable of saving files as plain ASCII text. ) More conveniently, you can use the built-in Editor/Debugger, which you can start by typing edit, either by itself (to edit a new file) or followed by the name of an existing M-file in the current working directory.

Also, you can change the horizontal and vertical ranges of the graph with axis. For example, to confine the vertical range to the interval from 1 to 4, type >> axis([-2 2 1 4]) The first two numbers are the range of the horizontal axis; both ranges must 28 Chapter 2: MATLAB Basics be included, even if only one is changed. We’ll examine more options for manipulating graphs in Chapter 5. To close the graphics window select File : Close from its menu bar, type close in the Command Window, or kill the window the way you would close any other window on your computer screen.

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