areaLoss(X, r, ngrid=spatstat.options("ngrid.disc"), subset=NULL)
"ppp"
).ngrid * ngrid
array of test points
that will be used to estimate the uncovered area.X
for which the area difference should be computed.X
(or X[subset]
)
and one column for each value in r
.X[i]
in X
and for each radius r
,
the area of that part of the disc of radius r
centred at the
location X[i]
that is not covered by any of the
other discs of radius r
centred at the points X[j]
for j
not equal to i
.
This area is important in some calculations related to
the area-interaction model AreaInter
. The result is a matrix, with one row for each point in X
and one column for each entry of r
.
The area is calculated by discrete approximation, using an
ngrid * ngrid
grid of test points.
AreaInter
,
areaGain
data(cells)
areaLoss(cells, 0.1, 32)
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