multiplot: Multiple plots
In singha53/pandaR: PANDA Algorithm

Multiple plot function as described in: http://www.cookbook-r.com/Graphs/Multiple_graphs_on_one_page_(ggplot2)/. 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.

1	multiplot(..., plotlist = NULL, cols = 1, layout = NULL)

`...`	ggplot objects can be passed in or to plotlist (as a list of ggplot objects).
`plotlist`	NULL - if the plotlist is null, the function will figure out the panel dimensions.
`cols`	Number of columns in layout.
`layout`	A matrix specifying the layout. If present, 'cols' is ignored.