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\name{spRbind-methods}
\docType{methods}
\alias{spRbind-methods}
\alias{spRbind,SpatialPoints,SpatialPoints-method}
\alias{spRbind,SpatialPointsDataFrame,SpatialPointsDataFrame-method}
\alias{spRbind,SpatialLines,SpatialLines-method}
\alias{spRbind,SpatialLinesDataFrame,SpatialLinesDataFrame-method}
\alias{spRbind,SpatialPolygons,SpatialPolygons-method}
\alias{spRbind,SpatialPolygonsDataFrame,SpatialPolygonsDataFrame-method}
\alias{spRbind}
\title{rbind for spatial objects}
\description{
\code{spRbind} provides rbind-like methods for Spatial*DataFrame objects
}
\section{Methods}{
\describe{
\item{obj = "SpatialPoints", x = "SpatialPoints"}{rbind two SpatialPoints objects}
\item{obj = "SpatialPointsDataFrame", x = "SpatialPointsDataFrame"}{rbind two SpatialPointsDataFrame objects}
\item{obj = "SpatialLines", x = "SpatialLines"}{rbind two SpatialLines objects}
\item{obj = "SpatialLinesDataFrame", x = "SpatialLinesDataFrame"}{rbind two SpatialLinesDataFrame objects}
\item{obj = "SpatialPolygons", x = "SpatialPolygons"}{rbind two SpatialPolygons objects}
\item{obj = "SpatialPolygonsDataFrame", x = "SpatialPolygonsDataFrame"}{rbind two SpatialPolygonsDataFrame objects}
}}
\note{
In addition to the \code{spRbind}-methods, there are also
\code{rbind}-methods for Spatial* objects. The differences are:
\enumerate{
\item{\code{spRbind}-methods can bind 2 objects, whereas \code{rbind}-methods
can bind multiple object}
\item{some \code{rbind} can accept objects with duplicated IDs, for all
\code{spRbind}-methods these have to be modified explicitly, e.g. by
calling \code{\link[sp]{spChFIDs-methods}}}
}}
\author{Roger Bivand}
\seealso{\code{\link[sp]{spChFIDs-methods}}, \code{\link{spCbind-methods}}}
\examples{
xx <- readShapePoly(system.file("shapes/sids.shp", package="maptools")[1],
IDvar="FIPSNO", proj4string=CRS("+proj=longlat +ellps=clrk66"))
summary(xx)
xx$FIPSNO
xx1 <- xx[xx$CNTY_ID < 1982,]
xx2 <- xx[xx$CNTY_ID >= 1982,]
xx3 <- spRbind(xx2, xx1)
summary(xx3)
xx3$FIPSNO
}
\keyword{methods}
\keyword{spatial}
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