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Data Analysis and Statistics for Geography, Environmental Science, and Engineering
book

Data Analysis and Statistics for Geography, Environmental Science, and Engineering

by Miguel F. Acevedo
December 2012
Beginner content levelBeginner
557 pages
19h 5m
English
CRC Press
Content preview from Data Analysis and Statistics for Geography, Environmental Science, and Engineering
279Spatial Point Patterns
γ
γγ
()
()[()()] exp
h
c
h
a
h
h
=
+− −−
>
++
0001 0
0
2
2
when
when ==
0
(8.45)
It reaches the sill asymptotically as the exponential model. We dene the range as that distance
at which gamma is 95% of the sill as in Equation 8.41. It can be calculated from parameter a using
ha a
95
31732
. (8.46)
This is illustrated in Figure 8.20 for a = 3, c(0) = 1, γ(0
+
) = 0.2. In this case, the range is
h
95
331732
35
.
8.10.4 linear anD poWer MoDels
The semivariance increases linearly with h and does not reach a maximum. This indicates a nonsta-
tionary variable. This is to say the variance does not reach a constant value, at l ...
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Publisher Resources

ISBN: 9781439885017