Mathematica 6.0 help

[relativity_x]

I always use Matlab/C++ for programming assignments; however, I don't have access to either at the moment. Therefore, I'm using Mathematica.

Anyway, I need to assign values to a vector, and then plot the 3d surface which it creates.

Here's what I've done:

x_name=[x1,x2,...,xn]
y_name=[y1,y2,...,yn]
z_name=[z1,z2,...,zn]

Plot3D[x_name,y_name,z_name]

output=GraphPlot3D::argx: GraphPlot3D called with 3 arguments; 1 argument is \
expected. >>