MATLAB: How to add three dimensional data points to MATLAB

3d data pointsMATLAB and Simulink Student Suite

I want to add 3D data points associated with spacecraft debris positions in space. Do I create a 3 x n matrix of Latitude, Longitude, Altitude? The goal is to use the multiobjective genetic algroithm to locate the maximum density of debris objects at a given point in time and plot it.