SpatialLines

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