Thank you for your feedback. I din't know that topological data analysis even exist! I have some published and unpublished research on the topic.
I had used this particular dataset by random. I wanted to use something with integers, large sample size and with high dimension.
I'm glad you did the community detection stuff. I found it useful when the dimension is really large (in the order of thousand variables). For instance, when doing text mining.
very nice comment!