It returns rulers (axis)
rulerPlot(
ycoord,
listOfdfChromSize,
listOfdfChromSizeCenType,
fromZerotoMax,
rulerNumberSize,
rulerPosMod,
rulerPos,
ruler.tck,
lwd.chr
)
y coords
list of all d.f chr size
only d.f. of this cen. type
intervals
font
modifier of pos.
pos. of ruler
tick size and orient.
axis