R: Class "SpatialPoints"

SpatialPoints-class {sp}

R Documentation

Class "SpatialPoints"

Class for (irregularly spaced) points

Objects can be created by calls of the form SpatialPoints(x).

coords:: Object of class "matrix", containing the coordinates (each row is a point)
bbox:: Object of class "matrix", with bounding box
proj4string:: Object of class "CRS", projection string

Class "Spatial", directly.

[: signature(x = "SpatialPoints"): subsets the points; only rows (points) can be subsetted
coerce: signature(from = "SpatialPoints", to = "data.frame"): retrieves the data part
coerce: signature(from = "SpatialPoints", to = "SpatialPixels"): equivalent to assigning gridded TRUE for a copy of the object
coerce: signature(from = "SpatialPointsDataFrame", to = "SpatialPixelsDataFrame"): equivalent to assigning gridded TRUE for a copy of the object
coerce: signature(from = "data.frame", to = "SpatialPoints"): sets coordinates, which may be in a data frame
coerce: signature(from = "matrix", to = "SpatialPoints"): set coordinates, which may be in a matrix
coordinates: signature(obj = "SpatialPoints"): retrieves the coordinates, as matrix
plot: signature(x = "SpatialPoints", y = "missing"): plot points
summary: signature(object = "SpatialPoints"): summarize object
points: signature(x = "SpatialPoints"): add point symbols to plot
show: signature(object = "SpatialPoints"): prints coordinates
rbind: signature(object = "SpatialPoints"): rbind-like method

The plot method for “SpatialPoints” objects takes the following arguments:

x: object of class SpatialPoints
pch: default 3; either an integer specifying a symbol or a single character to be used as the default in plotting points
axes: default FALSE; a logical value indicating whether both axes should be drawn
add: default FALSE; add to existing plot
xlim: default NULL; the x limits (x1, x2) of the plot
ylim: default NULL; the y limits of the plot
...: passed through
setParUsrBB: default FALSE; set the par “usr” bounding box, see note in Spatial-class
cex: default 1; numerical value giving the amount by which plotting text and symbols should be magnified relative to the default
col: default 1; default plotting color
lwd: default 1; line width
bg: default 1; colour to be used for the background of the device region

x = c(1,2,3,4,5)
y = c(3,2,5,1,4)
S <- SpatialPoints(cbind(x,y))
S <- SpatialPoints(list(x,y))
S <- SpatialPoints(data.frame(x,y))
S
plot(S)

[Package sp version 2.1-4 Index]