2. Trellis Graphics:the lattice package Trellis plots are designed to be easy to interpret and at the same time provide some modern and sophisticated plotting styles, such as multi-panel conditioning. Image source: www.stat.auckland.ac.nz/~paul/RGraphics/chapter1.pdf
7. 3-d Plots using cloud() One of the very powerful features of Trellis Graphics is the ability to specify conditioning variables within the formula argument. Something of the form y ~ x | g indicates that several plots should be generated, showing the variable y against the variable x for each level of the variable g. Image source: www.stat.auckland.ac.nz/~paul/RGraphics/chapter1.pdf