How do i add legend

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jeet Mehta
jeet Mehta 2019-6-11
回答： Emmanuel Adesina 2021-4-24
HI all i am just willing to add legend to the above figure where i just wana involve legend for x1 and data 1 what is the command to type that . this is an SMC controller.

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回答（2 个）

Lizhou
Lizhou 2019-6-11
x = linspace(0,pi);
y1 = cos(x);
p1 = plot(x,y1);
hold on
y2 = cos(2*x);
p2 = plot(x,y2);
y3 = cos(3*x);
p3 = plot(x,y3);
hold off
legend([p1 p3],{'First','Third'})
Emmanuel Adesina
Emmanuel Adesina 2021-4-24
You can simply plot all as:
plot(x,y1, x,y2, x,y3, ...)
or
line(x,y1)
line(x,y2)
line(x,y3)
...
and add all legend at once.
legend("y1","y2","y3",...)

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