Silhouette: How do I 'add' labels to bars and assign colors to each cluster

Matlab SMEs,

Request help/advice:

1) Adding Labels to each bar on Silhouette

2) Assign different colors to each Silhouette bar or each cluster

My data, silTab.mat, attached & my attempts below.

Thank you.

--Allen

silLabels=SilTab.Properties.RowNames;

[ss sh]=silhouette(SilTab{:,1:20},SilTab{:,21},'Euclidean');
sh.Color=copper(length(sh)); % copper colormap for each bar

[ss sh]=silhouette(SilTab{:,1:20},SilTab{:,21},'Euclidean');
set(gca,{'Color'},num2cell(copper(length(sh)),2));

[ss sh]=silhouette(SilTab{:,1:20},SilTab{:,21},'Euclidean');
set(gca,'yticklabel',silLabels)

Answer 1

[Vijay]

Hello @AR

I am assuming by each cluster you mean different color for each bar. In a single bar graph you cannot do that, But there are workarounds.

Steps:

1. Extract data from current figure

2. Plot a new desired bar graph.

Step 1: Extracting Data

data = get(sh.CurrentAxes, 'Children'); 
x = get(data, 'XData'); 
y = get(data, 'YData'); 

Step2: Plotting graph.

Please refer to the link below on how to get different color for each bar.

bar plot with different color bars depending on height - MATLAB Answers - MATLAB Central (mathworks.com)

For Adding labels to the graph please refer to the link below

Horizontal bar graph - MATLAB barh - MathWorks India

Hope that helps!

[AR]

VB, Thank you. This is exactly what I need. I did hope there was sinlge line of code that existed to color code the silhoutte output plot's bars, however this method works great. Best Regards, --Allen