| SpatialPointsDataFrame-class {sp} | R Documentation |
Class for spatial attributes that have spatial point locations
Objects can be created by calls of the form coordinates(x) = c("x", "y") .
or of the form coordinates(x) = xy; see coordinates.
data:coords:"matrix"; the coordinates matrix
(points are rows in the matrix) coords.strippedbbox:"matrix"; bounding boxproj4string:"CRS"; projection string
Class "SpatialPoints", directly.
Class "Spatial", by class "SpatialPoints".
signature(x = "SpatialPointsDataFrame"): subset rows or
columns; in case of row subsetting, the coordinates are also subsetted signature(from = "SpatialPointsDataFrame", to = "data.frame"): extracts the attribute part signature(obj = "SpatialPointsDataFrame"): retrieves
the coordinates only signature(object = "SpatialPointsDataFrame"): print method signature(object = "SpatialPointsDataFrame"): summarize objectsignature(x = "SpatialPointsDataFrame"): add points to plotEdzer J. Pebesma, e.pebesma@geo.uu.nl
coordinates, SpatialPoints-class
data(meuse)
xy = meuse[c("x", "y")] # retrieve coordinates as data.frame
class(meuse)
data(meuse) # reload data.frame
coordinates(meuse) = c("x", "y") # specify column names
class(meuse)
data(meuse) # reload data.frame
coordinates(meuse) = c(1, 2) # specify column names
class(meuse)
data(meuse) # reload data.frame
coordinates(meuse) = ~x+y # formula
class(meuse)
data(meuse) # reload data.frame
coordinates(meuse) = xy # as data frame
class(meuse)
data(meuse) # reload data.frame
coordinates(meuse) = as.matrix(xy) # as matrix
meuse$log.zn = log(meuse$zinc)
class(meuse)
dim(meuse)