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splancs (version 2.01-3)

stkhat: Space-time K-functions

Description

Compute the space-time K-functions

Usage

stkhat(pts, times, poly, tlimits, s, tm)

Arguments

pts
A set of points as defined in Splancs
times
A vector of times, the same length as the number of points in pts
poly
A polygon enclosing the points
tlimits
A vector of length 2 specifying the upper and lower temporal domain.
s
A vector of spatial distances for the analysis.
tm
A vector of times for the analysis

Value

  • A list with the following components is returned:
  • s, tThe spatial and temporal scales
  • ksThe spatial K-function
  • kt

item

kst

References

Rowlingson, B. and Diggle, P. 1993 Splancs: spatial point pattern analysis code in S-Plus. Computers and Geosciences, 19, 627-655; the original sources can be accessed at: http://www.maths.lancs.ac.uk/~rowlings/Splancs/. See also Bivand, R. and Gebhardt, A. 2000 Implementing functions for spatial statistical analysis using the R language. Journal of Geographical Systems, 2, 307-317.

See Also

stsecal, stvmat, stmctest, stdiagn