Simulink: 2-D lookup table using 2 vectors as input and a matrix as lookup data and

Hi,

I have: (1) a 2-D matrix of data - Z, 2D_data_matrix (2) a vector of independent data - x, input_vect_#1_50pts (3) a vector of dependent data - y, input_vect_#2_50pts

For each time step, I want to run a 2-D lookup on the 50 pairs of x,y data where each individual x-y data pair queries the 2-D matrix of data, i.e. I want to do the equivalent of this matlab code:

output_vector_50pts=interp2(2D_data_matrix, input_vect#1_50pts, input_vect_#2_50pts)

What is the most efficient way to do this? Can I use inbuilt Simulink blocks or do I have to user-define them? What blocks do I use? Do I have to use an initialize function in the model to load my 2-D data?

I have used a buffer and while that works it is not a long term solution....

Thanks a million for any help.