census {untb} | R Documentation |
In package untb, ecosystem data is held in one of two preferred forms:
census data and count data. Function as.census()
coerces to
census format
census(a) as.census(a) is.census(a)
a |
Ecosystem data. In function as.census() , if a table,
interpret as species count data; otherwise, interpret as census data |
Semantically, a “census” is a list of individuals. In R idiom, a census is a vector whose elements indicate the individuals' species.
An object of class census is an unordered factor. The levels are always in alphabetical order; the vector itself is sorted so that the individuals of the most abundant species appear first, individuals of the second most abundant species appear second, and so on: the singletons appear last.
Function census()
takes an object of class “count” and
returns an object of class “census”
Returns an object of class “census”.
Robin K. S. Hankin
a <- c(rep("oak",5) ,rep("ash",2),rep("elm",3),rep("xx",4)) # note that "a" is a plain vector here. as.census(a)