Material for Coursera course "Exploratory Data Analysis" https://class.coursera.org/exdata-011
Source data can be download from: https://d396qusza40orc.cloudfront.net/exdata%2Fdata%2Fhousehold_power_consumption.zip
Repository contains 4 R scripts and 4 png, produced by R scripts. All scripts assume that's workspace contain directory "data" with txt file acquired from link above.
According task "Your code file should include code for reading the data so that the plot can be fully reproduced". Thats why there is some duplication in code over R scripts.