Graph Centrality and Closeness Centrality are 0 Zero

Question

Hello to all;

I have drawn a network and am having trouble running some of the centrality measures- no matter what I try, I am always getting '0.00' for the graph centrality and the closeness centrality assessments.

I saw another help response that said to first run do an auto-grouping, and I see that all the elements in my graph are connected!

Why am I still having this problem?

Comments

Hard to tell without knowing you graph and settings. Would you care to upload your diagram (in GraphML format) and post your centrality settings?

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thanks for the quick response!
No problem to upload-- sorry for the ignorance, but how could I upload it to this thread? many thanks.

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Either edit or answer your question and follow the instructions in How to upload files to yEd Q&A?

Answer 1

Your graph is not connected. (I.e. your graph consists of more than one connected component. See Wikipedia for details.) You can easily check this by running "Layout" -> "Organic" or "Layout" -> "Components". The result will be two visually distinct graph components and one isolated node (three connected components in total).

As a workaround, you can create one document for each of your graph's components and run the centrality measures on each component separately.

Answer 2

great, very helpful, cheers!

 

here is my graph

 

There was an underlying image that I removed. Maybe I'm just missing something super obvious, but I have tried to look for disconnected nodes and I found one, although the file that I sent you still contains that node. Just wondering if you could help out.

 

Many thanks!