Construct, coerce, and test for a census object
In package untb, ecosystem data is held in one of two preferred forms:
census data and count data. Function
as.census() coerces to
census(a) as.census(a) is.census(a)
- Ecosystem data. In function
as.census(), if a table, interpret as species count data; otherwise, interpret as census data
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.
census() takes an object of class count and
returns an object of class census. This function is not
really intended for the end user.
as.census() coerces to class count then
census() of the result.
Returns an object of class census.
jj <- c(dogs=4,pigs=10,slugs=0,fish=1) x <- census(jj) # slugs appear as zero abundance extant(x) # slugs gone x+x # count method for census objects: order of elements lost as.census(jj) # probably NOT what you meant 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)