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Spatial Point Patterns
book

Spatial Point Patterns

by Adrian Baddeley, Ege Rubak, Rolf Turner
November 2015
Intermediate to advanced content levelIntermediate to advanced
828 pages
33h 11m
English
Chapman and Hall/CRC
Content preview from Spatial Point Patterns
Poisson Models 329
x -0.8031 0.05863 -0.9180 -0.6882 *** -13.698
y 0.6496 0.11571 0.4228 0.8764 *** 5.614
This is the fitted model w ith intensity fun ction
λ
θ
((x,y)) = exp(
θ
0
+
θ
1
x +
θ
2
y) (9.28)
where spatial coordinates x and y are measured in kilometres and, for example, the estimate of
θ
1
is
ˆ
θ
1
= 0.8031 with standa rd error se(
ˆ
θ
1
) = 0.05863 and 95% confidence interval [0.918,0.6882].
The amount of information displayed, and the layout, depend on spatstat.options('terse')
and spatstat.options('print.ppm.SE').
The fitted coefficients of the model can be extracted by coef.ppm, a method for the generic
function coef:
> coef(fitkm)
(Intercept) x y
9.0910 -0.8031 ...
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Publisher Resources

ISBN: 9781482210217