[mskullcap]

All the "enter, exit" stuff is what makes d3 beautiful. From a core handful of ideas, Mike is able to express a vast world of visualizations. I think it is the most amazing framework I have had the pleasure of using in my 30+yrs of software development. Ya, you could grab bar chart library and just give it data and get a graph out, or, you could spend a little time with d3 and actually learn something so powerful you can make bar charts - or virtually any other kind of visualization you will ever need. Well worth working past the frustration, imo.