[PD] 3d plot : z values in an x-y matrix

[Jean-Marie Adrien]

Hello,

Ive been looking for a while and still do not find the object - that  
must be existing - to make a mesh-like 3d curve, similar to the one  
that can be obtained with gem's curve3d, but from data in the form of  
z values in an x-y matrix.
If the object that processes the matrix does not exist, I could fix  
one with an object that plots a single array in 3d space, translating  
by "hand" curves to obtain a 3D mesh.
Do one or the other object exist ?
Thanks
JM