
299Spatial Point Patterns
panel6(size=7)
eda6(xyz$z)
We get EDA plots as in Figure 8.36. We can conclude from the histogram, boxplot, and density that
most points have low value of the variable, and a few have large value. From the Q–Q plot and ecdf
we can conrm that the data are not normally distributed.
We will use seeg’s function vario, which in turn uses package sgeostat to analyze the xyz
pattern. Function vario uses functions point to generate a point object, plots it to visualize the
point pattern, then uses function pair to generate a point object and a pair object. Function pair
requires us to dene number of lags and the maximum d