Produces some summary plots for clustering analysis
Usage
stdiagn(pts, stkh, stse, stmc=0,Dzero=FALSE)
Arguments
pts
A set of points, as used in Splancs
stkh
An object returned from stkhat
stse
An object returned from stsecal
stmc
An object returned from stmctest
Dzero
FALSE - default D plot, TRUE Dzero plot
Details
Four plots are produced on the current graphics device.
The first plot is simply a map of the data. The second is a perspective plot
of the difference between space-time K-function and the product of spatial
and temporal K-functions. The third plot is of the
standardised residuals against the product of spatial and temporal
K-functions. If the Monte-Carlo data is given the fourth plot is a
a histogram of the test statistics, with the value for the data indicated
with a vertical line.
See Diggle, Chetwynd, Haggkvist, and Morris (1995) for details.
References
Diggle, P., Chetwynd, A., Haggkvist, R. and Morris, S. 1995 Second-order analysis of space-time clustering. Statistical Methods in Medical Research, 4, 124-136;Bailey, T. C. and Gatrell, A. C. 1995, Interactive spatial data analysis. Longman, Harlow, pp. 122-125;
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.