HegyiCICalculator: the function to calculate intraspecific and interspecific...
In bcgov/FAIBBase: Basic functions for forest mensuration and ecology

HegyiCICalculator

R Documentation

the function to calculate intraspecific and interspecific hegyi competition index both distance and size

the function to calculate intraspecific and interspecific hegyi competition index both distance and size

HegyiCICalculator(
  objectID,
  species,
  coordX,
  coordY,
  size,
  maxRadius,
  distanceWeight = 1,
  sizeWeight = 0
)

`objectID`	character, The unique object identifier. Must be unique.
`species`	character, Species code to identify intra and inter-specific competition.
`coordX`	numeric, The x coordinate.
`coordY`	numeric, The y coordinate.
`size`	numeric, The size that used for compute competition index.
`maxRadius`	numeric, The competition index will been calculated within this radius
`distanceWeight`	numeric, Define how the compeition sensitive to the distance of a neighbours, ie., crowdness. Default is 1, which is same as the original Hegyi index.
`sizeWeight`	numeric, Define how the compeition scales across all the plots. Default is 0, which means there is no scale.

a data table that has five columns, plotNumber, treeNumber, Year, IntraH and InterH

no note

Yong Luo