I want to build the square wave: build a 6 subplot figure to show the time domain, and use respectively 1, 3, 5, 10, 50, 500 frequencies.How can i achieve this?

I want to build the square wave: build a 6 subplot figure to show the time domain, and use respectively 1, 3, 5, 10, 50, 500 frequencies.How can i achieve this?

Answer 1

[Image Analyst]

Start with this:

allFreqs = [1, 3, 5, 10, 50, 500];
for k = 1 : length(allFreqs)
    thisFreq = allFreqs(k);
    subplot(length(allFreqs), 1, k);
    % Code to generate Rect want, for you to do.
    rectWave = whatever....................
    plot(rectWave, 'b-', 'LineWidth', 2);
    grid on
    caption = sprintf('Frequency = %d', thisFreq);
    title(caption, 'FontSize', 15);
    drawnow;
end

[Boyi]

Can you explain specifically what needs to be written after reactwave=?

[Image Analyst]

I could but since it seems like your homework I don't want to get you into trouble by having you turn in my code as your own. I don't want you to get expelled! Try square function in the Signal Processing Toolbox.

[Boyi]

yep I understand .because it is my first time using Matlab, I am very unfamiliar with how to use it, but thank you for your reply, it was very helpful.

Answer 2

[John D'Errico]

Solve a problem that is too large for you to handle by breaking it up into small enough chunks to handle.

1. Do you know how to use subplot? Clearly, you know about subplots. So read the help. Look at the examples.
2. Do you know how to plot a square wave? It sounds like you are asking how to use an FFT, So learn how to use an FFT to solve the problem for one case, then using a loop, solve it 6 times.