op_ppp {groupedHyperframe} | R Documentation |
Operations on ppp.object
Description
Create fv.objects or distances from a ppp.object.
Usage
dist_ppp(x, fn, ...)
fv_ppp(x, fn, ...)
Arguments
x |
|
fn |
a distance function, or a function that returns an fv.object, see Details |
... |
additional parameters of function |
Details
First, the input ppp.object is unstack.ppp-ed.
Each of the numeric marks could be analyzed by following functions that return an fv.object,
If one of the functions above are provided
but there is no numeric marks in the input,
a NULL
value will be returned.
Each of the marks that is.multitype could be analyzed by following functions that return an fv.object,
or by following functions that return a distance,
If one of the functions above are provided
but there is no marks is.multitype in the input,
a NULL
value will be returned.
Value
Function fv_ppp()
returns a listof
fv.objects,
one for each eligible marks.
Function dist_ppp()
returns a listof
double vectors,
one for each eligible marks.
Examples
library(spatstat.data)
library(spatstat.explore)
fv_ppp(betacells, fn = Emark) # applicable to numeric mark
fv_ppp(betacells, fn = Gcross, i = 'off', j = 'on') # applicable to multitype mark
dist_ppp(betacells, fn = .nncross, i = 'off', j = 'on')
dist_ppp(gorillas, fn = .nncross, i = 'major', j = 'minor')
dist_ppp(gorillas, fn = .nncross, i = 'rainy', j = 'dry')