I am a beginner to Network/Graph Analysis. I have data in the following format: **Customer | CustomerSpend** Anna $10 Bob $30 Charlie $50 **Customer1 | Customer2 | RelationshipStrength | ZipCode** Anna Bob 5 11111 Bob Charlie 10 22222 - I want to visualize and conduct some analysis on the data set (which groups spend most, which zipcodes spend most, etc.). - I am thinking of using NodeXL or igraph (in R) to get started. - I also want to brush up on graph theory to understand the various metrics I could look at. What resources can I leverage to get started?