Mark Newcomb <newc1.mac <at> me.com> writes: > > I'm hoping to use R for spatial analysis. In working through examples in Chapt. 4 of Applied Spatial Data > Analysis with R I've come across the following error in trying to plot lines with the meuse data set. The > text is verbatim from the book.
This is in Chapter 3, and is mentioned in the errata on the book website, http://www.asdar-book.org. The code download is also updated on the website. The erratum is: Chapter 3 Page 59: Top of page - from sp version 0.9-66, Lines objects must be give a valid ID; changed to m.sl <- SpatialLines(list(Lines(list(Line(cc)), "1"))). Lines and Polygons objects must have valid IDs. As mentioned in another reply, the R-sig-geo list may be more relevant for a question of this kind. Hope this clarifies, Roger > > > m.sl <- SpatialLines(list(Lines(list(Line(cc))))) > Error in Lines(list(Line(cc))) : Single ID required > > What does "Single ID required" mean? > > Thanks. > > Mark > > ______________________________________________ R-help@r-project.org 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.
