multiplot: Multiple plot function
In welch16/rwlib: These is a package with the functions that I use the most.

ggplot objects can be passed in ..., or to plotlist (as a list of ggplot objects) @param cols number of columns in layout @param layout a matrix specifying the layout. If present, cols is ignored. If the layout is something like matrix(c(1,2,3,3), nrow=2, byrow=TRUE), # then plot 1 will go in the upper left, 2 will go in the upper right, and # 3 will go all the way across the bottom. @export taken from https://support.bioconductor.org/p/68650/ link to highlight axis too http://rpubs.com/lgadar/matrix-visualizations