How can i obtain strucutre like this format, please ?

i'm new to matlab and was working on clustering using this link

https://www.mathworks.com/matlabcentral/fileexchange/53922-densityclust?s_tid=FX_rc3_behav

if some can help me in this lines , how can i obtain like this structure as i have file of two columns for x,y and another file with three columns for the distance between them ..

fileName = 'demo.mat';
f=load(fileName); % NOTE that the 'demoData.mat' file includes a matrix <X> with *NE* elements and *2* dim,
% NE is the number of elements of a data set

the mat file in the example code contains like this

{'__header__': b'MATLAB 5.0 MAT-file, Platform: PCWIN64, Created on: Sat Nov 07 03:04:35 2015', '__version__': '1.0', '__globals__': [], 'X': array([[ 1.40325035,  1.22212839],
    [ 2.37541376,  1.90058719],
    [-0.69413515,  1.81762962],
    ...,
    [-1.31957801, -1.155144  ],
    [-1.38098383, -1.43077273],
    [-1.21105289, -1.61001161]])}

[Image Analyst]

You forgot to attach 'demo.mat'. I'll check back later for it.