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Simulate single sine wave

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daarneokyddam
daarneokyddam on 9 Nov 2020
Hi all, can someone please explain to me how I can similate this graph in matlab?

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Answers (2)

Sindar
Sindar on 9 Nov 2020
Without the noisy signal? See sin documentation.
With the signal (i.e. fitting to it), check out the answer to this question

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Bastian Arturo Romero Mardones
time = linspace(0,5,200); %Sampling signal
signal = sin(2*pi*time); %sine wave
vectorx = [ones(1,length(time)/4) 3*ones(1,length(time)/4) ...
2*ones(1,length(time)/4) 4*ones(1,length(time)/4)];
errorSimulated = rand(1,length(vectorx)); %simulated error
yyaxis left; %name axis Y left
plot(time,signal); hold on; %plot sine wave
ylabel('Sinusoidal signal')
yyaxis right;%name axis Y right
scatter(vectorx,errorSimulated) %scatter of error
ylabel('Simulated error')

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daarneokyddam
daarneokyddam on 15 Nov 2020
I get this graph now, did I do anything wrong? Is it btw possible that the y-axis reaches from -90 to 90, and the x-axis from -40 to 40?
Bastian Arturo Romero Mardones
yes, you only must add this lines
yyaxis left;
plot(time,signal); hold on;
ylabel('Sinusoidal signal')
ylim([-90 90]) %ylimit ---------- First line
yyaxis right;
scatter(vectorx,errorSimulated)
ylabel('Simulated error')
xlim([-40 40]) %xlimit ---------- Second line

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