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 | Location** Anna Bob 5 NY Bob Charlie 10 TX - I want to visualize and conduct some analysis on the data set (which groups spend most, which locations 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?