[Simulink] Constructing a for loop equivalent to apply to a matrix

I am having an issue on treating elements of a [3x64] matrix using Simulink.

This matrix is composed of 64 columns of 3 coordinates (x,y,z) (3 rows). My goal is to transform each one of this columns into Latitude,Longitude,Altitude coordinates. For that, I have a block computing the latitude, logitude, altitude coordinates for one column x,y,z. I want to apply this to all the matrix. I am having trouble on the dimensions and to set the output of the Index Vector to [3x1]. Here is my model, could someone help me please?