Introduction to D3

This tutorial is in response to a request by someone who wanted a basic introduction to D3. I've never used D3 before, but I've learned a bit about it so far and this is just an introduction to get you started anyways.

Basically, what I've found is that D3 is a lot like JQuery in many regards. You can select existing (and not-yet-existing) elements, manipulate them graphically, perform animations, etc. The best aspect of D3 seems to be that although the learning curve is rather steep for anyone who's a beginning coder, it actually ends up making most tasks of displaying/arranging data on a web page very simple and easy - you just have to know how. :)