How do I draw a horizontal line at a fixed height on the y axis and print the coordinates of the points I intercept?

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Hi, I have a matlab plot with 6 curves (or functions).
My y-axis ranges from 0 to 255.
My x-axis ranges from -20 to 20.
How do I "draw" a horizontal line (for example y = 80) and the points it intercepts, print the coordinates and which function they refer to. The functions are differentiated in the legend by colors and names.

답변 (1개)

KSSV
KSSV 2021년 10월 11일
th = linspace(0,2*pi) ;
x = sin(th) ;
plot(th,x)
hold on
line([th(1) th(end)],[0.4 0.4])

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