untb (version 1.0-20)

census: Construct, coerce, and test for a census object

Description

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

Usage

census(a)
as.census(a)
is.census(a)

Arguments

a

Ecosystem data. In function as.census(), if a table, interpret as species count data; otherwise, interpret as census data

Value

• Returns an object of class census.

Details

Semantically, a census is a list of individuals. In Ridiom, 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

See Also

count

Examples

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)