Could you please tell me if a function named s.voronoi really exists and where I might find it? Thanks in advance, Elena ********************************* * ET&P Srl * * Via Musolesi, 1/a * * I-40138 Bologna (ITALY) * * Phone +39-51-392350/60 * * Fax +39-51-392348 * * E-mail etep at etep.dsnet.it * *********************************