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`method'

Values for method that make gstat deviate from the default action are:

gs
override the default kriging method to get Gaussian simulations (section 2.6)

is
override the default kriging method to get indicator simulations (section 2.6)

semivariogram
sample semivariance on output (see also fit)

covariogram
sample covariogram on output

trend
spatial trend estimation ( $x_0 \hat \beta$), using generalised least squares if variograms are specified, or else using ordinary or weighted least squares (see Appendix A.2)

map
report the value of $m$ mask maps at the prediction location of data() as the output values, provided that $n$ (dummy) input variable are defined, with $n \ge m/2$ (example 9)

distance
report distance to nearest observation as the predicted value, and the distance to the most distant observation (in the neighbourhood selection, if defined) as prediction variance

nr
report number of observations in neighbourhood as predicted value, and, if omax was set, the number of non-empty octants (or quadrants) as prediction variance

div
diversity (the number of distinct values) in a local neighbourhood is reported as the predicted value, the range of the values (largest value $-$ smallest value) is reported as prediction variance

med
local median or quantile estimation, see quantile

point-in-polygon
Provided a set of (closed) polygons is given with the edges command, the (first) polygon in which the prediction location is located is given in the output. Predicted value carries the file number of the polygon, prediction variance the polygon number in the file. See also Appendix B


next up previous contents index
Next: Further control Up: Command file syntax Previous: `set'   Contents   Index
Edzer Pebesma
1999-08-31