how to add legends?

I want to merge 3 plots into one..how can i do that

Answer 1

[M]

You can also use the following:

hold on %after the first plot to continue plotting on the same figure

legend on

% or legend('plot1','plot2','plot3');

Answer 2

[Sean de Wolski]

doc subplot
doc legend

[Eric]

Perhaps also "doc hold"