According to DeepMIMO Dataset, for example, O1_28, how can I create a 3D data file of channels and a 2D data file of user locations. (The red texts)

What elements should I include in both data files?

%================================================================================%
% Main script for training and testing a DL model to predict mmWave (28
% GHz) beam indecies from sub-6 GHz channels. The script assumes the data
% provided in the form of two (.mat) files:
% - dataFile1: Sub-6 data
% - dataFile2: 28GHz data

% Each .mat is a data structure with the following fields: channels and user
% locations. Channels should be arranged into a 3D array with the following
% dimensions: # of antenna elements X # of sub-carriers X # of users. User
% locations should be a 2D array with the folllowing dimensions: 3 X # of users.
% The "options" structure provide control over the type of experiment to run.
% -------------------------------------------------------------------------------
% Author:
% Muhammad Alrabeiah,
% Sept 2019.
%
%=================================================================================%

From  https://github.com/malrabeiah/Sub6-Preds-mmWave

Thanks

Krittin