Convert Line Segment Pattern to Another Unit of Length
Converts a line segment pattern dataset to another unit of length.
## S3 method for class 'psp' rescale(X, s, unitname)
X |
Line segment pattern (object of class |
s |
Conversion factor: the new units are |
unitname |
Optional. New name for the unit of length.
See |
This is a method for the generic function rescale.
The spatial coordinates in the line segment pattern X
(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 X.
(Thus, the coordinate values are divided by s,
while the unit value is multiplied by s).
The result is a line segment pattern representing the same data but re-expressed in a different unit.
Mark values are unchanged.
If s is missing, then the coordinates will be re-expressed
in ‘native’ units; for example if the current unit is
equal to 0.1 metres, then the coordinates will be re-expressed in metres.
Another line segment pattern (of class "psp"),
representing the same data, but expressed in the new units.
The result of this operation is equivalent to the original segment pattern.
If you want to actually change the coordinates by
a linear transformation, producing a segment pattern that is not
equivalent to the original one, use affine.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
and Rolf Turner r.turner@auckland.ac.nz
data(copper)
X <- copper$Lines
X
# data are in km
# convert to metres
rescale(X, 1/1000)
# convert data and rename unit
rescale(X, 1/1000, c("metre", "metres"))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.