4 messages · Mark Newcomb, Duncan Murdoch, MacQueen, Don +1 more
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.
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
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.
m.sl<- SpatialLines(list(Lines(list(Line(cc)))))
Error in Lines(list(Line(cc))) : Single ID required What does "Single ID required" mean?
That message is coming from a contributed package, not from base R. You should say what package you're using, and you may need to contact the author or maintainer of it to get an answer. Duncan Murdoch
In addition to which, R-sig-geo would be better place to ask. -Don
Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 On 10/26/11 10:39 AM, "Duncan Murdoch" <murdoch.duncan at gmail.com> wrote: >On 26/10/2011 1:11 PM, Mark Newcomb wrote: >> 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. >> >> > m.sl<- SpatialLines(list(Lines(list(Line(cc))))) >> Error in Lines(list(Line(cc))) : Single ID required >> >> What does "Single ID required" mean? > >That message is coming from a contributed package, not from base R. You >should say what package you're using, and you may need to contact the >author or maintainer of it to get an answer. > >Duncan Murdoch > >______________________________________________ >R-help at 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.
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