Hi, I have this problem: >>> x=arange(0,pi,pi/100) >>> y=sin(x) >>> xplt.plot(x,y) A graphic window opens, but there is no plot in it. What's wrong? Thanks Agus Dr. Agustin Lobo Instituto de Ciencias de la Tierra (CSIC) Lluis Sole Sabaris s/n 08028 Barcelona SPAIN tel 34 93409 5410 fax 34 93411 0012 alobo at ija.csic.es