1. explore :: intro

http://r4ds.had.co.nz/explore-intro.html

exploratory data analysis

    –  data visualisation 
    –  data transformation   

http://onesixx.com/dplyr/

    – EDA

1. Generate questions about your data.
2. Search for answers by visualising, transforming, and modelling your data.
3. Use what you learn to refine your questions and/or generate new questions.
    – workflow: basics, workflow: scripts,  workflow: projects