make.grid: Make a grid of spatial bins
In stppResid: Perform residual analysis on space-time point process models.

Description Usage Arguments Details Value Author(s) See Also Examples

make.grid creates a space-time grid object of class “stgrid” for use with the functions gridresid and devresid.

1	make.grid(stw, grid = c(10, 10))

`stw`	A space-time window object of class “`stwin`” to be divided into space-time bins.
`grid`	A vector representing the number of rows and columns in the grid.

The space-time window, stw, is divided into a grid of space-time bins using the grid argument to determine the number of intervals in the x and y directions. The total number of bins will be the product of the elements of grid.

If grid is not specified, the default grid is 10 x 10, resulting in 100 total bins.

Outputs an object of class “stgrid”, which is a list of

grid.full

A data frame where each row represents a bin. There are four columns, xmin, xmax, ymin, and ymax, which represent the x and y limits of the bins.

Robert Clements

stwin, gridresid

#===> create a space-time window  <===#
xcoord <- c(0, 10)
ycoord <- c(0, 20)
tcoord <- c(0, 100)
stw <- stwin(xcoord, ycoord, tcoord)

#===> create a 10 x 10 grid <===#
gf <- make.grid(stw)

#===> create a 10 x 20 grid <===#
gf <- make.grid(stw, c(10, 20))
nrow(gf$grid.full)
ncol(gf$grid.full)

Loading required package: deldir
deldir 0.1-16
Loading required package: splancs
Loading required package: sp

Spatial Point Pattern Analysis Code in S-Plus
 
 Version 2 - Spatial and Space-Time analysis

Loading required package: cubature
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