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 |
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.
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.
Returns an object of class “census”.
Robin K. S. Hankin
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)