Convert Point Pattern to Another Unit of Length
Converts a point pattern dataset to another unit of length.
## S3 method for class 'ppp': rescale(X, s, unitname)
- Point pattern (object of class
- Conversion factor: the new units are
stimes the old units.
- Optional. New name for the unit of length.
This is a method for the generic function
The spatial coordinates in the point pattern
(and its window) will be re-expressed
in terms of a new unit of length that is
s times the current
unit of length given in
(Thus, the coordinate values are divided by
while the unit value is multiplied by
The result is a point pattern representing the same data but re-expressed in a different unit.
Mark values are unchanged.
s is missing, then the coordinates will be re-expressed
- Another point pattern (of class
"ppp"), representing the same data, but expressed in the new units.
The result of this operation is equivalent to the original point pattern.
If you want to actually change the coordinates by
a linear transformation, producing a point pattern that is not
equivalent to the original one, use
# Bramble Canes data: 1 unit = 9 metres data(bramblecanes) # convert to metres bram <- rescale(bramblecanes, 1/9) # or equivalently bram <- rescale(bramblecanes)