Interpolating between vectors to output matrix

Hi,

I have four vectors: - input_nodes which is the input coordinates of my structural portal frame. - Global_Load_vector is the loads at the nodes. For example the first 3 rows correspond to the load at the first node (0,0), the 4th, 5th & 6th node correspond to the load at the second node (0,6) and so on... - sub_nodes vector is the input nodes split up into a number of sub_nodes. - GLV_sub vector is the zero matrix I want to fill. It size is based on the sub_nodes vector x 3 (i.e. 3 loads per node).

Q1: I wish to fill the GLV_sub vector with the values from the Global_load_vector but they must be situated to correspond to the sub_nodes location. Q2: If I have more than the input_nodes specified do I need a loop.

input_nodes =

         0         0
         0         6
         0         6
         6         0

Global_Load_Vector =

         0
         0
         0
   -5.0000
    0.0000
    7.5000
   -5.0000
    0.0000
    7.5000
         0
         0
         0
sub_nodes =

         0         0
         0    1.5000
         0    3.0000
         0    4.5000
         0    6.0000
    1.5000    6.0000
    3.0000    6.0000
    4.5000    6.0000
    6.0000    6.0000
    6.0000    4.5000
    6.0000    3.0000
    6.0000    1.5000
    6.0000         0
GLV_sub =

     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
Expected answer:

GLV_sub =

     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
    -5
     0
     7.5
     0
     0
     0
     0
     0
     0
     0
     0
     0
    -5
     0
     7.5
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
     0
Thanks if you can help.