Plot Polynomial graphing problem

I don't know how to plot this equation on matlab.

A = 5.00e-30;
B = 8.00e-121;
r = 0.1:0.1:4;
V = (-A./r)+(B./r.^10);
plot(r,V)

I don't get any error. I don't know why i get a wrong graph.

[Star Strider]

What is it supposed to look like?

What function do you want to plot?

Answer 1

[Morteza]

It should look like this: http://upload.wikimedia.org/wikipedia/commons/a/a3/Lennard-Jones.jpg

Idk y i get a strange graph...

Answer 2

[Image Analyst]

You're plotting an equation that is nothing at all like the equation for the desired graph given in http://en.wikipedia.org/wiki/Lennard-Jones_potential so why do you think you should get the same curve shape?

Answer 3

[Star Strider]

Your expression for ‘V’ does not closely match the Lennard-Jones potential AB-form. That suggests you should have an exponent for ‘r’ that is greater than 1 in your ‘A’ term, and that you should not negate the ‘A’ term.

Since I do not know what you are doing, I will leave that to you to sort out.