By Michael Weeks
Textual content isn't really quite thourough or rigorous. Introduces a few suggestions like FFT with out explaining them absolutely, leaving that for later sections. If purchasing for a category you haven't a lot selection, if paying for for reference or own examine i might glance somewhere else.
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Additional resources for Digital Signal Processing using MATLAB and Wavelets
The disp command can also display information to the screen. It does not matter if the disp command is followed by a semicolon. It can be used in conjunction with sprintf, as the following example shows. 142 The single quotes specify a string. Notice how the following output changes depending on the presence of the quotes. 4 Conditional Statements (if ) Like most programming languages, the way to execute code conditionally is with the if statement. In the following example, the division is done only when the denominator does not equal zero.
This editor is not required, however, because any text editor will work. Here is one frustrating mistake that programmers occasionally make: if a program or function is changed in the editor, but not saved to disk, then the old version of it will be used when it is executed. Make sure to save your work before trying to run it! 1 DSP Using MATLAB and Wavelets Working with Variables A common programming mistake is to use a variable without declaring it first. This is not a problem in MATLAB. In fact, MATLAB is very flexible about variables and data types.
Notice the colon “:” in the place of the column specifier. This is intentional, it is a little trick to specify the whole range. We could have used the command d(4,1:2)=[7 8] to say the same thing, but the first version is easier (and less typing). >> d(4,:)=[7 8] d = 1 3 5 7 2 4 6 8 What if we want to select column 1 only? The following code does this. >> d(:,1) ans = 1 3 5 7 Compare the previous output to the following command. >> d(1,:) ans = 1 2 MATLAB 35 The last two examples show how to access column 1 and row 1, respectively.