Plotting the tone frequencies

I am in the process of creating sound. I've created the tone frequencies, but I'll need to show it on a diagram (ex. plot), but it keep giving me error, when using the:

plot(s1+s2);

What am I doing wrong?

The two first plots doesn't give any results, it's just blue.

   figure
   subplot(3,1,1);
   plot(t, s1);
   xlim([0 1E+3]);
   grid
   subplot(3,1,2);
   plot(t, s2);
   xlim([0 1E+3]);
   grid
   subplot(3,1,3);
   plot(t, s1 + s2);
   xlim([0 1E+3]);
   grid
   

[Cris LaPierre]

It's always helpful to share the full error message as well.

When I run the code you shared with the plot command at the end, it generates a warning, but the plot appears. Is that what you see?

[Anonym]

Updated the thread.

Yes sorry, I meant there wasn't something inside the plot, when the window pop-up. It was only blue inside.

Answer 1

[Star Strider]

Note that ‘t’ seems to be missing.

Substituting for it and changing the xlim parameters:

   t = values;
   
   figure
   subplot(3,1,1);
   plot(t, s1);
   xlim([0 1E-1]);
   grid
   subplot(3,1,2);
   plot(t, s2);
   xlim([0 1E-1]);
   grid
   subplot(3,1,3);
   plot(t, s1 + s2);
   xlim([0 1E-1]);
   grid

appears to create two separate tones and a modulated summation.

It is necessary to ‘zoom’ the plots this way in order to see the details.

[Anonym]

Yeah, I had it but used the linspace function.

[Anonym]

Thanks, got it working, makes much more sense now;)

[Star Strider]

As always, my pleasure!

[Anonym]

Sorry for disturbing again :-) I have a question that might be not be related to this topic, not sure but I'll give it a go. I have another question, how should I examine how the distance depends on tonevolume, how can I utilize this to create a consistent voix céleste effect in a tone with an overtone profile (harmonic profile), and implementing a scale with voix céleste effect? Any idea, what I could say about that?

[Star Strider]

I had to look up voix céleste.

I honestly have no idea. You will have to experiment to get the result you want.

[Anonym]

Yeah, thanks alot. Figured it out, found out it was kind of the same as the beateffect :-)

I'd like to ask you, if you could help me to plot the two frequencies in one plot? So it'll be combined, will show both graph in the same plot. I tried to use the examples the person did, but couldn't it gave me a blank figure window (https://se.mathworks.com/help/matlab/creating_plots/combine-multiple-plots.html)

I tried the following, but couldn't get it to work.

figure            
plot(values, s1); 
hold on
plot(values, s2);
grid
hold off

[Star Strider]

I am not certain what the problem is. If you are using ‘t’ as the independent variable (as in your initial post), try this:

figure            
plot(t, s1); 
hold on
plot(t, s2);
grid
hold off

.

[Anonym]

Thanks, got it working. Sorry for keep disturbing you, but could you help me with adding a header function, tried multiple ways: https://se.mathworks.com/matlabcentral/answers/612961-adding-header-function-to-two-frequencies

[Star Strider]

I do not understand what you mean by ‘header function’.

What is it supposed to do?

[Anonym]

It's declaring function name: https://se.mathworks.com/help/matlab/ref/function.html

[Star Strider]

I posted an Answer to it.

[Anonym]

Hello, sorry for always disturbing you. Do not know who else I could ask. There is just one thing I am curious about regarding this; is that how can I analyze a graph a two-tone frequencies that are combined in a graph? By your help and using your assistance, I have created two pairs of two frequencies with a close frequency and one with two frequencies that are far apart from each other. There is a clear difference, but how can we analyze it directly from the graph?

Explanation of two-tone frequencies that is combined into one graph - MATLAB Answers - MATLAB Central (mathworks.com)

Appreciating your help.

[Star Strider]

No worries.

I posted a sort-of Answer to it.