Problems with exp-functions

Hi!

I want to make a function of x.

This is my code:

x=(0:0.001:5); %x-values
f=2*x*exp(-x);
plot(x,f)

But MatLab is telling me:

Error using  * 
Inner matrix dimensions must agree.

What does this mean in this case and how do I solve it?

Answer 1

[Walter Roberson]

f=2*x.*exp(-x);

[Alexander Engman]

Thanks, I figured it out!