r.SDE: Demo Data: Standard Deviation Ellipse Output Object

Description

Results from the Standard Deviation Ellipse Calculator (calc_sde) are stored in a list object. This object is required for the plot function (plot_sde).

Usage

data(r.SDE)

Arguments

Format

The list object contains the following results:

id: Identifier for the SDE estimate - it should be unique
points: a simple two-column data frame (or matrix) containing x,y coordinates for a series of point locations.
coordsSDE: coordsSDE value, coordinates of the SDE
calccentre: Boolean: TRUE if mean centre is computed
CENTRE.x: X-coordinate of the centre
CENTRE.y: Y-coordinate of the centre
Sigma.x: Half-length of axis along x-axis
Sigma.y: Half-length of axis along y-axis
Major: String indicating which axis is the major elliptical axis
Minor: String indicating which axis is the minor elliptical axis
Theta: Rotation angle in degrees
Eccentricity: A measure of eccentricity (i.e., the flatness of the ellipse)
Area.sde: Area of the SDE
TanTheta: Trigonometric result
SinTheta: Trigonometric result
CosTheta: Trigonometric result
SinThetaCosTheta: Trigonometric result
Sin2Theta: Trigonometric result
Cos2Theta: Trigonometric result
ThetaCorr: Corrected theta angle for rotation of major axis from north
weighted: Boolean: TRUE if the weighted mean centre is to be used instead
weights: Weights applied to point observations

Source

This demonstration data has been manufactured for illustrative purposes only.

Details

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

Examples

Run this code

  data(r.SDE)
  str(r.SDE)

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