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How can I use matlab to generate a "periodic" and "aperiodic" waveform?

the "periodic" and "aperiodic" waveform can be any giving or use matlab to create them. After have those 2 waveforms, use matlab to plot it.

the "periodic" and "aperiodic" waveform can be any giving or use matlab to create them. After have those 2 waveforms, use matlab to plot it.

1 Solution

You should aim to get your waveforms into two Matlab arrays (called say "waveformPeriodic" and "waveformAperiodic") which each have 2 columns, but do not necessarily have the same number of rows. The first column of each array will hold the sample times.

The following code will generate some example arrays :

>> t1 = [1:100]';

>> waveformPeriodic = [t1,sin(t1/10)];

>> waveformAperiodic = [sort(rand(100,1)*100),ran

Now for the plotting :

>> figure

>> plot(waveformPeriodic(:,1)

>> zoom on;

Type ">>help plot" for more information on Matlab's plot command. Note that I have set the linestyles to '.-' so that you can see the individual sample points.

Good luck.

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In two dimensions, try the following, which I have just happened to have available:

[X,Y] = meshgrid(0:.1:5,-1:.1:4); <-prepares a sortof collection of (x,y) points.

z = X.^2 - 4.*X + Y.^2 - Y - X.*Y; <-Calculates some function at every such point, saving in z

surfc(X,Y,z);view([1,1,1])

What do you mean by periodic and aperiodic? A function f(x) = x**2 which is not periodic can be made into a periodic function by repeating its x-parameter, that is, say

F(x) = f(x) for 0 <= x < 1,

= f(x - 1) for 1 <= x < 2,

= f(x - 3) for 2 <= x < 3, etc.

It is considered polite to avoid discontinuities at the chop points, but no matter.

Conversely, a periodic function, such as sine(x) can be made aperiodic by computing sine(exp(x))

Endless, endless possibilities.