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How do I plot a horizontal line on my existing graph?

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Wilbur
Wilbur 2023-6-15
回答： Dyuman Joshi 2023-6-15
I have a MATLAB plot of a graph consisting of values input into a matrix R of size R x 1.
On the same graph I want to plot a horizontal line of fixed value k.
How do I do this? I tried using the yline() function to no avail.
My code to plot the graph is:
plot(R)
Trying to add the horizontal line I tried:
plot(R,yline(k))
But it does not work. Any advice?

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Dyuman Joshi
Dyuman Joshi 2023-6-15
Ran in:
You need to use it as a separate command
%Random data for example
R = rand(10,1);
k = rand;
%plot the matrix
plot(R)
yline(k)

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