adding files

These are the files for Assignment 1. The 5 R files were used to create the 4 figures below. The file ReadProcessData.R was used to pre-process the original text file to create a more manageable file for the remaining 4 R files to use in creating the plot files. The files (plot1.png, plot2.png, plot3.png and plot4.png) were created using  the corresponding R files (plot1.R, plot2.R, plot3.R and plot4.R)