Usage
variogram(lat, lon = 0, z, nbins = 100, maxdist = 0, Hawk = T, throwout = F, scale = "km", evennumber = T, zzp = F, minnumber = 0, col.names = c("lat", "lon"))
Arguments
lat
Latitude of datapoints. If lon=0 lat is a list with components
\$lat and \$lon.
lon
longitude of datapoints.
nbins
Number of distance intervals used.
maxdist
maximum distance of interest. Default value is range of
data*0.7.
Hawk
If true the method from Cressie and Hawkins (1980) is used, else
the mean. Default value is T
throwout
If T datapoints with value zero are not used at all.
Default value is F which means that they are used. In all cases zero-zero
pairs are not used when the variogram is estimated.
scale
"km" or "nmi". Default is "km".
evennumber
If T distance classes are chosen so approximately the same
number of points is in each distance class. Else even distance increments
are used.
zzp
If true zero-zero pairs are used else not. Default value is F.
minnumber
Distance intervals with minnumber or less pairs are not
included. Default is zero.
col.names
if lat is a dataframe col.names should contain the names of
the vectors containing the x and y coordinates, default is c("lat","lon")