Chapter 4: Programming in Matlab - College of the Redwoods

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$Math 50A February 18, 2011 Quiz #10 Name: David Arnold ...$

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362 Chapter 4 Programming in Matlab >> whos Name Size Bytes Class M 3x3 72 double array Scripts and the Base Workspace When you execute a script file from the Matlab prompt in the command window, the script uses the base workspace. It can access any variables that are present in the base workspace, and any variables created by the script remain in the base workspace when the script finishes. As an example, open the Matlab editor and enter the following lines. x=1:5 s=sum(x) p=prod(x) Save the script as sumprod.m and return to the Matlab command window. Execute the script by typing its name at the command prompt. The script finds the sum and product of the integers from 1 to 5. >> sumprod x = 1 2 3 4 5 s = 15 p = 120 Examine the current state of the base workspace by typing the whos command at the command prompt.
Section 4.4 Variable Scope in Matlab 363 >> whos Name Size Bytes Class M 3x3 72 double array p 1x1 8 double array s 1x1 8 double array x 1x5 40 double array Note that the variables x, s, and p, created in the script, remain present in the base workspace when the script completes execution. If a variable exists in the base workspace, then a script executed in the base workspace has access to that variable. As an example, enter the following lines in the Matlab editor and save the script as usebase.m. fprintf(’Changing the base variable p.\n’) p=1000; fprintf(’The base variable p is now %d.\n’,p) Execute the script. >> usebase Changing the base variable p. The base variable p is now 1000. Now, at the Matlab prompt, examine the contents of the variable p in the base workspace. >> p p = 1000 Note that the script had both access to and the ability to change the base workspace variable p.
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4 Programming In Matlab In this cha
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Section 4.1 Logical Arrays 261 4.1
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Section 4.1 Logical Arrays 263 >> A
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Section 4.1 Logical Arrays 265 >> u
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Section 4.1 Logical Arrays 271 >> k
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Section 4.1 Logical Arrays 275 >> x
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Section 4.1 Logical Arrays 283 That
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Section 4.1 Logical Arrays 291 x=li
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Section 4.1 Logical Arrays 295 Elim
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Section 4.2 Control Structures in M
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