aspace (version 3.2)

CMD: Centre of Minimum Distance (CMD) Calculator

Description

Compute the CMD within a set of point locations.

Usage

CMD(id=1, filename="CMD_Output.txt", dist=100, 
points=activities)

Arguments

id

A unique integer to identify the CMD

filename

A string indicating the ASCII textfile where centre coordinates will be written

dist

Hold distance value between i and ith iterations

points

A 2-column matrix or data frame containing the set of point observations

Value

The result is a list of terms:

id

Identifier for the CMD - it should be unique

CMD.x

X-coordinate of the CMD

CMD.y

Y-coordinate of the CMD

distance

Hold distance value between i and ith iterations (metres

Number of Cells

Hold number of cells in each grid created for each iteration

Details

Use the cmdloc (coordinates) and cmdatt(attributes) to produce shapefiles using the convert.to.shapefile and write.shapefile from the shapefiles library

See Also

mean_centre, median_centre, CF

Examples

## CMD example
CMD(id=1, filename="CMD_Output.txt", dist=100, 
points=activities)

## CMD to shapefile example (exclude the comments below to run script)
## shp <- convert.to.shapefile(cmdloc,cmdatt,"id",5)
## write.shapefile(shp, "CMD_Shape", arcgis=T)