mvformula {mvabund} | R Documentation |
mvformula
is a method to create an object of class mvformula
as.mvformula
is a function to turn a formula into a mvformula
is.mvformula
tests if its argument is a mvformula
object.
mvformula
is a class of objects for which special-purpose plotting and regression functions have been written in the mvabund-package
. The above are useful preliminary functions before analysing data using the special-purpose functions. These new functions were written specially for the analysis of multivariate abundance data in ecology, hence the title 'mvabund'.
mvformula(x) as.mvformula(x) is.mvformula(x)
x |
an R object. |
mvformula
is a method to create an object of class mvformula
If the response of the resulting formula is not a mvabund
object, a warning
will be printed.
as.mvformula
is a function to turn a formula into a mvformula
if the response in x is a data.frame or an unsuitable object the conversion
will fail.
a formula mvabund for mvformula
and as.mvformula
a logical value indicating whether x
is a mvformula
object
Ulrike Naumann and David Warton <David.Warton@unsw.edu.au>.
require(graphics) data(spider) spiddat <- mvabund(spider$abund) X <- spider$x ## Create a formula for multivariate abundance data: foo <- mvformula( spiddat~X ) ## Check whether foo is a mvformula: is.mvformula(foo) ## Plot a mvformula: plot(foo)