coords: Extract or Change Coordinates of a Spatial or Spatiotemporal Point Pattern
Description
Given any kind of spatial or space-time point pattern,
this function extracts the
(space and/or time and/or local) coordinates of the points
and returns them as a data frame.
Usage
coords(x, ...)
## S3 method for class 'ppp':
coords(x, ...)
## S3 method for class 'ppx':
coords(x, ..., spatial = TRUE, temporal = TRUE, local=TRUE)
coords(x, ...) <- value
## S3 method for class 'ppp':
coords(x, ...) <- value
## S3 method for class 'ppx':
coords(x, ..., spatial = TRUE, temporal = TRUE, local=TRUE) <- value
Arguments
x
A point pattern: either a two-dimensional point pattern
(object of class "ppp"), a three-dimensional point pattern
(object of class "pp3"), or a
general multidimensional space-time point pattern
(object of class
...
Further arguments passed to methods.
spatial,temporal,local
Logical values indicating whether to extract spatial, temporal
and local coordinates, respectively. The default is to return all
such coordinates. (Only relevant to ppx objects).
value
New values of the coordinates. A numeric vector with one entry for each
point in x, or a numeric matrix or data frame with one row
for each point in x.
Value
coords returns a data.frame with one row for each point,
containing the coordinates.
coords<- returns the altered point pattern.
Details
The function coords extracts the coordinates from
a point pattern. The function coords<- replaces the coordinates
of the point pattern with new values.
Both functions coords and coords<- are generic, with methods for
the classes "ppp") and "ppx".
An object of class "pp3" also inherits from "ppx" and
is handled by the method for "ppx".