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longwidth
2011 Nov 16
0
calculating variograms (gstat) with large data sets
...is the code I am using:
"scans" is a 3 column vector containing x, y, and z values resulting
from a high resolution (1 m) digital elevation model. The extent of the
data is about 600*600 m, the
#define 50 bins log-scaled and with a maximum of 600
x = seq(1,50,1);
a = exp(log(600)/50);
logwidth = a^x;
#variogram
coordinates(scans) = ~V1+V2;
v = variogram(V3~1, scans, boundaries = logwidth);
Thank you very much,
Tom
--
Thomas Grünewald
WSL Institute for Snow and Avalanche Research SLF
Research Unit Snow and Permafrost
Team Snow Cover and Micrometeorology
Flüelastr. 11
CH-7260 Davos Do...