cross product for multi concentric vector (cylindrical coordinates)

Hi Guys,

I have created multi vectors in cylindrical coordinates, as seen in the attached images, I need to make a cross product between the centeral position vector by all position vector for each plane, an so on, pls help something like:

cross(0,0,z(1)), (x(1), y(1), z(1))

also I need to quiver all resulted vectors

Regrds

[darova]

use for loop and cross. What is the problem?