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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
415Geostatistics
12.6 COMPUTER SESSION: GEOSTATISTICS, KRIGING
12.6.1 orDinary kriGinG
Use the lab12/example-1x1.txt le, which is in geoEAS format. It contains x, y coordinates and
marks labeled “z”
xyz marked point pattern
3
x
y
z
0.4785 0.4668 103
0.7734 0.5599 110
0.934 0.8124 113
0.3497 0.5704 70
0.9335 0.4743 97
0.4852 0.9415 114
0.2065 0.3103 122
… etc …
First, read the le, convert to point pattern, and plot the point pattern marking by quartiles using
the script
xy <- scan.geoeas.ppp(“lab12/example-1x1.txt”)
xy.ppp <- ppp(xy$x, xy$y, marks=xy$z)
xyz <- point(xy)
plot.point.bw(xyz,v=‘z’,legend.pos=2,pch=c(21:24),main=“”,cex=0.7)
mtext(side=1,line=2,“x”) ...
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Publisher Resources

ISBN: 9781439885017