Added code to generate the "plot1.png" image
Added "plot2.R" script file to generate the "plot2.png" image
Plot 1 image file generated from "plot1.R" script file
Added files "plot3.R" and "plot4.R"
Ignored file ".Rproj"
Added code to generate the "plot2.png" image
The "plot2.png" image file generated from "plot2.R" script file