Matlab Tutorial

Once you have opened Matlab, there is a Command Window for entering information on the right. The lower left window is Command History, this allows quick reproduction of something previously entered into Matlab. Just click and drag a line from the Command History window to the Command Window.

At any time that you need help with a function simply type help function or doc function into the command window and either text or html respectively will be presented to assist you. These commands are very useful in discovering new functions to use and how to use them. There is also a Help toolbar on the top of the screen. Note also the Current Directory dialog box. You will need to work with this when you wish to open Wav files that are on your computer.

Topics:

1. Create a variable: Matlab can use arrays, lists of numbers, or a scalar value to create variables.

2. Plot: We need to know how to plot functions in order to express the data that we have created or manipulated.

3. Subplot command: Plotting two graphs in the same figure window is useful to directly compare the graphs.

4. Fourier Transform Function in Matlab to see what frequencies are contained in a signal.

5. The Walsh Approximation M-File uses unit steps to create signals much like Fourier Series does with sines and cosines.

6. Matlab can be used for wave file analysis, to plot, listen, and even clear up wave files.

7. Wave file analysis of a tuning fork to determine its exact frequency.

This concludes this section of Matlab, please return to the Matlab Resource Page to continue.

***