polygons {sp}R Documentation

sets spatial coordinates to create spatial data, or retrieves spatial coordinates

Description

sets spatial coordinates to create spatial data, or retrieves spatial coordinates

Usage

        polygons(obj)
        polygons(object) <- value

Arguments

obj object of class "SpatialPolygonsDataFrame"
object object of class "data.frame"
value object of class "SpatialPolygons"

Value

polygons returns the SpatialPolygons of obj; polygons<- promotes a data.frame to a SpatialPolygonsDataFrame object

Examples

data(ncshp)
nc1 <- as.SpatialPolygons.Shapes(nc.shp$Shapes, as.character(nc.shp$att.data$FIPS))
df <- nc.shp$att.data
rownames(df) <- df$FIPS
polygons(df) <- nc1
class(df)
[Package sp version 0.7-12 Index]