HW#4 - First cut at D3 plot for final project

[rcquan]

Homework 4

Author: Ryan Quan (rcquan)
Date: 2014-11-20
GitHub: www.github.com/fryandata/ecstasy

Description

This D3 plot is intended to answer the following question:

Out of all pills sold as ecstasy for a given year, how often was chemical X present?

With the owner's permission, we used R's XML package to scrape XML data from EcstasyData.org. We then used dplyr for data cleaning and wrote the resulting data to JSON using RJSONIO.

TODO

1. Fix the axis so that movement of points is more apparent.
2. Remove labels for clump of points below y = 0.05.
3. Add tooltips for more information about chemical compound on hover.
4. Add path transitions to make rank changes more apparent between years.
5. Color points by activity type: "dissociative", "stimulant", etc.
6. Add zoom feature.
7. Add option to remove "MDMA" from graph.