splot can it do

I am looking for a plotting application or library for 2D and 3D, data
and function  representation.
in my selection process i have establish that i want the application or
library to have the ability  to do the following kind of graphs. 
z(x,y)=  5*cos(2*sqrt(x*x+y*y))*exp(-0.3*sqrt(x*x+y*y)).  
So the question is can gnuplot do this? yes yes how?
thanks
Kemal