Completed Course Project 1 for Exploratory Data Analysis (Coursera course)
plotX.R contains R code that uses function plotX() to generate plotX.png

Data for these graphs is from the UC Irvine Machine Learning Repository,
"Individual household electric power consumption Data Set". The data is
available at
https://d396qusza40orc.cloudfront.net/exdata%2Fdata%2Fhousehold_power_consumption.zip