Richness of a vector of individuals — Richness.factor • SpatDiv

Richness is the number of species.

# S3 method for factor
Richness(
  NorP,
  Correction = "Chao1",
  Alpha = 0.05,
  JackOver = FALSE,
  ...,
  CheckArguments = TRUE
)

Arguments

NorP: A wmppp.object, with PointType values as species names.
Correction: A string containing one of the possible corrections: "None" (no correction), "Jackknife", "iChao1", or "Chao1", the default value.
Alpha: The risk level, 5% by default, used to optimize the jackknife order.
JackOver: If TRUE, retain the jackknife order immediately superior to the optimal one, usually resulting in the overestimation of the number of species. Default is FALSE.
...: Further arguments passed to entropart::Tsallis, entropart::Diversity, entropart::Richness, entropart::Shannon or entropart::Simpson (S3 methods for class 'AbdVector' or 'numeric')
CheckArguments: If TRUE (default), the function arguments are verified. Should be set to FALSE to save time in simulations for example, when the arguments have been checked elsewhere.

A named number equal to the calculated diversity. The name is that of the bias correction used.

Richness(Paracou6$marks$PointType, Correction="Jackknife")
#> Jackknife 2 
#>         471