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
A census object is a list of individuals in the form of an
unnamed vector whose elements indicate the individuals' species;
compare count objects.
An object of class census is also 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. This function is not
really intended for the end user.
Function as.census() coerces to class count then
returns census() of the result.