Number of elements of clusters from dbscan

How to get the elements of clusters from a dbscan clustering.Like,

Clust1=[1,2,0.3,0.1....]

Clust2=[4,.....]

etc. How can I do that? Please help me.

Thank you.

[Ameer Hamza]

Do you have a sample dataset for clustering?

[BHAGYALAKSHMI M]

Yes Sir. I attached here.

Answer 1

[Ameer Hamza]

This example code read data from the excel file. Change column two from text to numeric and then apply dbscan clustering.

data=readtable('Liverxl.xlsx', 'ReadVariableNames', false);
data.Var2 = findgroups(data.Var2); % convert column 
data.Var10(isnan(data.Var10)) = 0; % place 0 in empty cells
minpts=3;
epsilon=30;

data = table2array(data);
[idx, corepts] = dbscan(data,epsilon,minpts);

number_of_clusters = sum(unique(idx)>0);

% remove ouliers
core_data = data(corepts, :);
core_idx = idx(corepts);

% Clusters are saved in a cell array
clusters = splitapply(@(x) {x}, core_data, core_idx);

Tune the value of parameters, minpts and epsilon to change the size and number of elements in clusters.

[BHAGYALAKSHMI M]

Thank you sir.

From this how can I get the elements contains in every clusters.

Like cluster1 ={1,2,3,4,5}(the elements)

clus2={.1,3.2,4.5,10} etc.

[Ameer Hamza]

clusters is a cell array. You can get elements of a cluster using following syntax:

clusters{1} % it will show all the element of first cluster
clusters{2} % 2nd cluster
...
...
clusters{end} % last cluster

[BHAGYALAKSHMI M]

Thank you Sir.