powered by
It returns rulers (axis)
rulerTitle( xmnoNA, ymnoNA, chrSpacing, yPosRulerTitle, listOfdfChromSizeCenType, MbUnit, specialyTitle, yTitle, xPosRulerTitle, rulerTitleSize )
x coords
y coords
chr. spacing
only d.f. of this cen. type
intervals
modifier of pos.
pos. of ruler
font
font size
plot