A simple introduction to plotting / graphing in R:

1. Basic Plotting in R
2. Saving Plots in R
3. Comparing Many Variables With Plots in R
4. Plotting Multiple Series in R
5. Custom X Axis Labels in R
6. Labeling Plots – Annotations, Legends, etc
7. Multiple Plots and Visualizing Distributions
8. Visualizing and Comparing Distributions
9. Multiple Y Axes in R Plots
10. Filled Line Plots / Graphs – and also stacked line plots
11. Shading Pieces of a Plot, eg weekends, recessions
12. Plotting a group of plots in an array, grid, or matrix