math
setup-grid 2x1 /top=1mm
inset grid:0,0
plot 'sin(x)' 
next-inset grid:1,0
ylabel "" 
plot 'x**2'
draw-line /width=5 0,10 -30,10 /color=Red
draw-line /width=5 0,50 -30,50 /color=Blue /clipped=false /depth=5