Plotting the tone frequencies

2020 10 4
1 个回答
回答已采纳
更新时间：2020 12 7
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0 个投票

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

2 个评论
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Cris LaPierre
Cris LaPierre 2020-10-4
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
Anonym 2020-10-4
编辑：Anonym 2020-10-4
Updated the thread.
Yes sorry, I meant there wasn't something inside the plot, when the window pop-up. It was only blue inside.

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 采纳的回答

Star Strider
Star Strider 2020-10-4

0 个投票

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.

13 个评论
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Anonym
Anonym 2020-10-4
Yeah, I had it but used the linspace function.
Anonym
Anonym 2020-10-4
Thanks, got it working, makes much more sense now;)
Star Strider
Star Strider 2020-10-4
As always, my pleasure!
Anonym
Anonym 2020-10-4
编辑：Anonym 2020-10-4
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
Star Strider 2020-10-4
I had to look up voix céleste.
I honestly have no idea. You will have to experiment to get the result you want.
Anonym
Anonym 2020-10-11
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
Star Strider 2020-10-11
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
Anonym 2020-10-13
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
Star Strider 2020-10-13
I do not understand what you mean by ‘header function’.
What is it supposed to do?
Anonym
Anonym 2020-10-13
It's declaring function name: https://se.mathworks.com/help/matlab/ref/function.html
Star Strider
Star Strider 2020-10-13
I posted an Answer to it.
Anonym
Anonym 2020-12-7
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
Star Strider 2020-12-7
No worries.
I posted a sort-of Answer to it.

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