Hi all, I have a simple question: I have a data.frame like this: id x y 1 50 1647685 4815259 2 50 1647546 4815196 3 50 1647454 4815294 4 50 1647405 4815347 5 50 1647292 4815552 6 50 1647737 4815410 7 74 1647555 4815201 8 74 1647464 4815023 9 74 1646970 4815129 10 74 1646895 4815264 11 74 1646762 4815513
and I'd like to trasform it with the "convert.to.shapefile" function (shapefiles package) but to make this I must have a data.frame like this: id x y 1 50 1647685 4815259 2 50 1647546 4815196 3 50 1647454 4815294 4 50 1647405 4815347 5 50 1647292 4815552 6 50 1647737 4815410 7 50 1647685 4815259 8 74 1647555 4815201 9 74 1647464 4815023 10 74 1646970 4815129 11 74 1646895 4815264 12 74 1646762 4815513 13 74 1646762 4815513 with the first point of every id repeated to close the polygon. There is a function to make this indipendently by the number of the id Best regards Leonardo -- Leonardo Lami email + jabber: [EMAIL PROTECTED] www.faunalia.it Cell: (+39)349-1310164 Tel+Fax: (+39) 0587-213742 Piazza Garibaldi 5 - 56025 Pontedera (PI), Italy ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.