Hi, I have a vector of points. Is it possibble to link them (ordering by cat value...) to create a line vector? Thanks Leonardo -- Leonardo Lami lami at faunalia.it www.faunalia.it Via Colombo 3 - 51010 Massa e Cozzile (PT), Italy Tel: (+39)349-1310164 GPG key @: hkp://wwwkeys.pgp.net http://www.pgp.net/wwwkeys.html https://www.biglumber.com