SpatialPoints-class {sp} | R Documentation

## Class "SpatialPoints"

### Description

Class for (irregularly spaced) points

### Objects from the Class

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

### Slots

`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

### Extends

Class `"Spatial"`, directly.

### Methods

[

  `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

### plot method arguments

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

### Author(s)

Edzer Pebesma, edzer.pebesma@uni-muenster.de

### See Also

`SpatialPointsDataFrame-class`

### Examples

    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 1.3-1 Index]