Cannot make several plots in one graph with the command "hold on"

Hello,

as a total beginner in MatLab, I tried to create a graph with several plots on it using the command hold on.

Like :

x1 = linspace(1,10,10); f1 = x1.^2/2.*sin(x1);

x2 = linspace(1,20,20); f2 = x2.^2/2.*sin(x2);

x3 = linspace(1,100,100); f3 = x3.^2/2.*sin(x3);

plot(x1, f1, 'b');

hold on;

plot(x2, f2, 'g');

plot(x3, f3, 'r');

But the only plot that stays is the last one. Need help please !

Thanks'

Answer 1

[dbmn]

funny, all the 3 lines stay exactly on each other, that way you dont see the other two lines. So everything is working as it should.

You can see the plots by specifying a marker

plot(x1, f1, 'bo');
hold on;
plot(x2, f2, 'g*');
plot(x3, f3, 'r');