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Chapter 1: Problem 8

Close the Figure Window, and change back to the original directory that MATLAB started in. Next type "test2" in the Command Window. What happens, and why?

Short Answer

Expert verified
When "test2" is entered in the Command Window after closing the Figure Window and changing back to the original directory, one of two things will happen. If "test2" is a function or script in the original directory, MATLAB will run it and display the output. If "test2" does not exist as a function or script in the original directory, MATLAB will display an error message stating that 'test2' is not recognized because MATLAB cannot find the script or function in the current directory.

Step by step solution

01

Close the Figure Window

To close the Figure Window, simply locate the window and click on the 'x' button at the top right corner, or use the "close all" command in the Command Window to close all open Figure Windows.
02

Change back to the original directory

In the Command Window, use the "cd" (change directory) command followed by the path of the original directory that MATLAB started in. If you don't know the path, you can type "userpath" in the Command Window to see the default path, and then use "cd" to change back to it. For example, if the original directory was "C:\Users\Username\Documents\MATLAB", then type: ``` cd C:\Users\Username\Documents\MATLAB ```
03

Type "test2" in the Command Window

After changing back to the original directory, type "test2" in the Command Window and press Enter.
04

Observe the result and explain why it happens

When you type "test2" in the Command Window, one of the following can happen: 1. If "test2" is a function or a script in the original directory, MATLAB will run that function or script as expected. The output, if any, will be displayed in the Command Window. 2. If "test2" does not exist as a function or a script in the original directory, MATLAB will display an error message stating that 'test2' is not recognized. This error occurs because MATLAB cannot find a script or function named "test2" in the current directory. Make sure that the file exists and is located in the current directory, or define a function or script with the name "test2" if it is missing.

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Most popular questions from this chapter

Change the current directory to mynewdir. Then open an Edit Window and add the following lines: 8\. Create an input array from \(-2\) *pi to 2 *pi \(t=-2 * \mathrm{pi}: \mathrm{p} i / 10: 2^{\circ} \mathrm{pi}\); of Calculate |sin(t)| \(x=a b s(\sin (t))\); \- Plot result plot \((t, x)=\) Save the file with the name test2. \(m\), and execute it by typing test 2 in the Command Window. What happens?

Suppose that \(u=1\) and \(v=3\). Evaluate the following expressions asing MATLAB. a. \(\frac{4 u}{3 v}\) b. \(\frac{2 v^{-2}}{(u+v)^{2}}\) c. \(\frac{v^{3}}{v^{3}-u^{3}}\) d. \(\frac{4}{3} \pi v^{2}\)

Use the MATLAB Help Browser to find out how to create a new directory from within MATLAB. Then, create a new directory called mymewdir under the current directory, Add the new directory to the top of MATLAB's path.

Solve the following system of simultaneous equations for \(x\). \(-2.0 x_{1}+5.0 x_{2}+1.0 x_{3}+3.0 x_{4}+4.0 x_{5}-1.0 x_{6}=0.0\) \(2.0 x_{1}-1.0 x_{2}-5.0 x_{3}-2.0 x_{4}+6.0 x_{5}+4.0 x_{6}=1.0\) \(-1.0 x_{1}+6.0 x_{2}-4.0 x_{3}-5.0 x_{4}+3.0 x_{5}-1.0 x_{6}=-6.0\) \(4.0 x_{1}+3.0 x_{2}-6.0 x_{3}-5.0 x_{4}-2.0 x_{5}-2.0 x_{6}=10.0\) \(-3.0 x_{1}+6.0 x_{2}+4.0 x_{3}+2.0 x_{4}-6.0 x_{5}+4.0 x_{6}=-6.0\) \(2.0 x_{1}+4.0 x_{2}+4.0 x_{3}+4.0 x_{4}+5.0 x_{5}-4.0 x_{6}=-2.0\)

Use the MATLAB Help Browser to find the command required to show MATLAB's current directory. What is the current directory when MATLAB starts up?
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