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