Class "Stem" for building tree and log like subclasses

Description

This class is virtual. It provides the minimal structure to build subclasses that can be tailored to the desired application. Notably, the "downLog" and "standingTree" subclasses are already implemented. It provides the basis for graphical display via the sp package.

Objects from the Class

A virtual Class: No objects may be created from it.

Slots

species:

Object of class "character": Some form of identifier to species or group level.

units:

Object of class "character": The units of measurement system used, must be either "English" or "metric".

location:

Object of class "SpatialPoints": The x,y location of the object, can include z (elevation) but this is not used currently.

spUnits:

Object of class "CRS": A legal proj.4 coordinate system; the default is to have user-defined coordinates.

description:

Object of class "character": Some helpful comment about the object.

userExtra:

Object of class "ANY": This could be anyting the user wants to store with the object; specifically, it might hold information that is difficult to pass incorporate in any way given the constraints on "Stem" objects.

Methods

plot

signature(x = "Stem", y = "missing"): Graphical display of the object. Minimal display is the object location.

show

signature(object = "Stem"): Show main components or summary of an object.

summary

signature(object = "Stem"): Concise summary of the object.

Author(s)

Jeffrey H. Gove

See Also

Subclasses "downLog" for downed logs and "standingTree" for standing trees.

Examples

1
showClass("Stem")

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