r.SDD {aspace}R Documentation

Demo Data: Standard Deviation Distance Output Object

Description

Results from the Standard Deviation Distance Calculator (calc_sdd) are stored in a list object. This object is required for the plot function (plot_sdd).

Usage

data(r.SDD)

Format

The list object contains the following results:

id
Identifier for the SDD estimation - it should be unique
points
a simple two-column data frame (or matrix) containing x,y coordinates for a series of point locations.
SDD
SDD value, radius of the SDD
calccentre
Boolean: TRUE if mean centre is computed
weighted
Boolean: TRUE if the weighted mean centre is to be used instead
weights
Weights applied to point observations
CENTRE.x
X-coordinate of the centre
CENTRE.y
Y-coordinate of the centre
central.x
X-coordinate of central feature
central.y
Y-coordinate of central feature
median.x
X-coordinate of median centre
median.y
Y-coordinate of median centre
CMD.x
X-coordinate of centre of minimum distance
CMD.y
Y-coordinate of centre of minimum distance
SDD.area
Area of the SDD circle

Details

The coordinates of the points must have the same units and projection as the specified center.

Source

This demonstration data has been manufactured for illustrative purposes only.

Examples

  data(r.SDD)
  str(r.SDD)

[Package aspace version 2.2 Index]