How to created plot with three lines

I need to create a plot with three lines displayed on a single plot. I understand how to make three plots with the correct data but I need them on the same plot.

This is the format we use in my class to do so.

figure subplot(1,2,1) title () xlabel() ylabel()

This creates multiple plots. I know there is a way to make only a single plot but I cannot figure it out. Also, is there a way for me to enter a textbox that I can put an analysis of the plot in my figure?

Answer 1

[Star Strider]

I would use the hold function to put all the plots on the same axis. The other function you want is legend:

x = linspace(-5, 5);
y1=x.^2; 
y2=-5*x+2 ;
y3=4*ones(size(x));

figure(1)
plot(x, y1)
hold on
plot(x, y2)
plot(x, y3)
hold off
grid
legend('y_1', 'y_2', 'y_3', 'Location', 'SW')