multiplot: Multiple plot function
In ksauby/dataproc: Data processing functions.

ggplot objects can be passed in ..., or to plotlist (as a list of ggplot objects)

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, file, cols = 1, layout = NULL)

`...`	extra arguments
`plotlist`	Defaults to `NULL`.
`file`	Data
`cols`	Number of columns in layout. Defaults to `1`.
`layout`	A matrix specifying the layout. If present, 'cols' is ignored.. Defaults to `NULL`.