Why is this? >>> t array([0, 1, 2, 3]) >>> t[0:2] array([0, 1]) Why is not array([0,1,2]) ? Am I not asking for positions 0,1 and 2 in t ? Thanks 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