labelplot: adds a letter and a title to a plot
In PhanstielLab/Sushi: Tools for visualizing genomics data

This function adds a letter and a title (both are optional) to the top of a plot. Udeful for generating paper figures.

labelplot(letter = NULL, title = NULL, letteradj = -0.05, titleadj = 0,
  letterfont = 2, titlefont = 2, lettercex = 1.2, titlecex = 1,
  letterline = 0.5, titleline = 0.5, lettercol = "black",
  titlecol = "black")

`letter`	A string, typically a letter or number (eg 'A', 'A)', '1', etc) to lable the plot with
`title`	A string for a plot title
`letteradj`	adj of letter. See `par`
`titleadj`	adj of title. See `par`
`letterfont`	font of letter. See `par`
`titlefont`	font of title See `par`
`lettercex`	cex of letter. See `par`
`titlecex`	cex of title See `par`
`letterline`	line of letter. See `par`
`titleline`	line of title See `par`
`lettercol`	color of letter. See `par`
`titlecol`	color of title See `par`

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par(mar=c(3,3,3,3))
plot((1:10),col=maptocolors(vec=(1:10),colorRampPalette(c("blue","red"))),pch=19,cex=4)
labelplot("A)"," sample plot",lettercex=2,titlecex=2,titlecol="blue")