Plot Contour

1# Minimal complete example: plot.contour2page=canvas(size=(100mm,75mm),background="#ffffff")3p=plot(size=(86mm,62mm),x=axis(range=(0,4)),y=axis(range=(0,5)))4p.contour(z=[[1,2,3],[2,4,2],[1,3,1]],levels=[1.5,2.5,3.5],extent=(0,4,0,5))5page.add(p,offset=(7mm,6mm))