labelgenome: Adds genome coordinates to the x-axis of a Sushi plot
In dphansti/Sushi: Tools for visualizing genomics data

Adds genome coordinates to the x-axis of a Sushi plot

labelgenome(chrom, chromstart = NULL, chromend = NULL, genome = NULL,
  space = 0.01, scale = "bp", side = 1, scipen = 20, n = 5,
  chromfont = 2, chromadjust = 0.015, chromcex = 1, chromline = 0.5,
  scalefont = 2, scaleadjust = 0.985, scalecex = 1, scaleline = 0.5,
  line = 0.18, edgeblankfraction = 0.1, ...)

`chrom`	chromosome to plot
`chromstart`	start position
`chromend`	end position
`genome`	a genome object (2 columns: column 1 = chromosome name, column 2 = length of chromosome). Only for multi chromosomal plots
`space`	the space in between each chromosome as a fraction of the width of the plot. Only for multi chromosomal plots
`scale`	Scale of the plot ('bp','Kb','Mb')
`side`	Side of the scale to add the plot to. Only tested for sides 1 and 3.
`scipen`	higher values decrease the likelihood of using scientific for the position labels.
`n`	Desired number of ticks
`chromfont`	font type of chromosome label
`chromadjust`	position, as a fraction of the width of the plot, of the chomosome label
`chromcex`	font size of the chomosome label
`chromline`	vertical offset of the chomosome label
`scalefont`	font type of scale label
`scaleadjust`	position, as a fraction of the width of the plot, of the scale label
`scalecex`	font size of the scale label
`scaleline`	vertical offset of the scale label
`line`	vertical offset of position labels
`edgeblankfraction`	percent of the edges to leave black for chromosome and scale labels
`...`	values to be passed to `axis`

data(Sushi_DNaseI.bedgraph)
# set the genomic regions

plotBedgraph(Sushi_DNaseI.bedgraph,chrom="chr11",chromstart=1650000,chromend=2350000,colorbycol=SushiColors(7))
labelgenome(chrom="chr11",chromstart=1650000,chromend=2350000,side=1,n=4,scale="Mb")
axis(side=2,las=2,tcl=.2)
mtext("Read Depth",side=2,line=1.75,cex=.75,font=2)